LCOV - code coverage report
Current view: top level - src - qs_linres_issc_utils.F (source / functions) Hit Total Coverage
Test: CP2K Regtests (git:2fce0f8) Lines: 333 397 83.9 %
Date: 2024-12-21 06:28:57 Functions: 5 5 100.0 %

          Line data    Source code
       1             : !--------------------------------------------------------------------------------------------------!
       2             : !   CP2K: A general program to perform molecular dynamics simulations                              !
       3             : !   Copyright 2000-2024 CP2K developers group <https://cp2k.org>                                   !
       4             : !                                                                                                  !
       5             : !   SPDX-License-Identifier: GPL-2.0-or-later                                                      !
       6             : !--------------------------------------------------------------------------------------------------!
       7             : 
       8             : ! **************************************************************************************************
       9             : !> \brief Chemical shift calculation by dfpt
      10             : !>      Initialization of the issc_env, creation of the special neighbor lists
      11             : !>      Perturbation Hamiltonians by application of the p and rxp oprtators to  psi0
      12             : !>      Write output
      13             : !>      Deallocate everything
      14             : !> \note
      15             : !>      The psi0 should be localized
      16             : !>      the Sebastiani method works within the assumption that the orbitals are
      17             : !>      completely contained in the simulation box
      18             : ! **************************************************************************************************
      19             : MODULE qs_linres_issc_utils
      20             :    USE atomic_kind_types,               ONLY: atomic_kind_type,&
      21             :                                               get_atomic_kind
      22             :    USE cell_types,                      ONLY: cell_type,&
      23             :                                               pbc
      24             :    USE cp_control_types,                ONLY: dft_control_type
      25             :    USE cp_dbcsr_api,                    ONLY: dbcsr_convert_offsets_to_sizes,&
      26             :                                               dbcsr_copy,&
      27             :                                               dbcsr_create,&
      28             :                                               dbcsr_distribution_type,&
      29             :                                               dbcsr_p_type,&
      30             :                                               dbcsr_set,&
      31             :                                               dbcsr_type_antisymmetric,&
      32             :                                               dbcsr_type_symmetric
      33             :    USE cp_dbcsr_cp2k_link,              ONLY: cp_dbcsr_alloc_block_from_nbl
      34             :    USE cp_dbcsr_operations,             ONLY: cp_dbcsr_sm_fm_multiply,&
      35             :                                               dbcsr_allocate_matrix_set,&
      36             :                                               dbcsr_deallocate_matrix_set
      37             :    USE cp_fm_basic_linalg,              ONLY: cp_fm_frobenius_norm,&
      38             :                                               cp_fm_trace
      39             :    USE cp_fm_struct,                    ONLY: cp_fm_struct_create,&
      40             :                                               cp_fm_struct_release,&
      41             :                                               cp_fm_struct_type
      42             :    USE cp_fm_types,                     ONLY: cp_fm_create,&
      43             :                                               cp_fm_get_info,&
      44             :                                               cp_fm_release,&
      45             :                                               cp_fm_set_all,&
      46             :                                               cp_fm_to_fm,&
      47             :                                               cp_fm_type
      48             :    USE cp_log_handling,                 ONLY: cp_get_default_logger,&
      49             :                                               cp_logger_get_default_io_unit,&
      50             :                                               cp_logger_type
      51             :    USE cp_output_handling,              ONLY: cp_p_file,&
      52             :                                               cp_print_key_finished_output,&
      53             :                                               cp_print_key_should_output,&
      54             :                                               cp_print_key_unit_nr
      55             :    USE input_section_types,             ONLY: section_vals_get_subs_vals,&
      56             :                                               section_vals_type,&
      57             :                                               section_vals_val_get
      58             :    USE kinds,                           ONLY: default_string_length,&
      59             :                                               dp
      60             :    USE mathlib,                         ONLY: diamat_all
      61             :    USE memory_utilities,                ONLY: reallocate
      62             :    USE message_passing,                 ONLY: mp_para_env_type
      63             :    USE particle_methods,                ONLY: get_particle_set
      64             :    USE particle_types,                  ONLY: particle_type
      65             :    USE physcon,                         ONLY: a_fine,&
      66             :                                               e_mass,&
      67             :                                               hertz,&
      68             :                                               p_mass
      69             :    USE qs_elec_field,                   ONLY: build_efg_matrix
      70             :    USE qs_environment_types,            ONLY: get_qs_env,&
      71             :                                               qs_environment_type
      72             :    USE qs_fermi_contact,                ONLY: build_fermi_contact_matrix
      73             :    USE qs_kind_types,                   ONLY: qs_kind_type
      74             :    USE qs_linres_methods,               ONLY: linres_solver
      75             :    USE qs_linres_types,                 ONLY: get_issc_env,&
      76             :                                               issc_env_type,&
      77             :                                               linres_control_type
      78             :    USE qs_matrix_pools,                 ONLY: qs_matrix_pools_type
      79             :    USE qs_mo_types,                     ONLY: get_mo_set,&
      80             :                                               mo_set_type
      81             :    USE qs_neighbor_list_types,          ONLY: neighbor_list_set_p_type
      82             :    USE qs_p_env_types,                  ONLY: qs_p_env_type
      83             :    USE qs_spin_orbit,                   ONLY: build_pso_matrix
      84             : #include "./base/base_uses.f90"
      85             : 
      86             :    IMPLICIT NONE
      87             : 
      88             :    PRIVATE
      89             :    PUBLIC :: issc_env_cleanup, issc_env_init, issc_response, issc_issc, issc_print
      90             : 
      91             :    CHARACTER(len=*), PARAMETER, PRIVATE :: moduleN = 'qs_linres_issc_utils'
      92             : 
      93             : CONTAINS
      94             : 
      95             : ! **************************************************************************************************
      96             : !> \brief Initialize the issc environment
      97             : !> \param issc_env ...
      98             : !> \param p_env ...
      99             : !> \param qs_env ...
     100             : ! **************************************************************************************************
     101          44 :    SUBROUTINE issc_response(issc_env, p_env, qs_env)
     102             :       !
     103             :       TYPE(issc_env_type)                                :: issc_env
     104             :       TYPE(qs_p_env_type)                                :: p_env
     105             :       TYPE(qs_environment_type), POINTER                 :: qs_env
     106             : 
     107             :       CHARACTER(LEN=*), PARAMETER                        :: routineN = 'issc_response'
     108             : 
     109             :       INTEGER                                            :: handle, idir, ijdir, ispin, jdir, nao, &
     110             :                                                             nmo, nspins, output_unit
     111             :       LOGICAL                                            :: do_dso, do_fc, do_pso, do_sd, should_stop
     112             :       REAL(dp)                                           :: chk, fro
     113             :       TYPE(cp_fm_struct_type), POINTER                   :: tmp_fm_struct
     114          44 :       TYPE(cp_fm_type), ALLOCATABLE, DIMENSION(:)        :: h1_psi0, psi0_order, psi1
     115          44 :       TYPE(cp_fm_type), DIMENSION(:), POINTER            :: fc_psi0, psi1_fc
     116          44 :       TYPE(cp_fm_type), DIMENSION(:, :), POINTER         :: dso_psi0, efg_psi0, psi1_dso, psi1_efg, &
     117          44 :                                                             psi1_pso, pso_psi0
     118             :       TYPE(cp_fm_type), POINTER                          :: mo_coeff
     119             :       TYPE(cp_logger_type), POINTER                      :: logger
     120             :       TYPE(dft_control_type), POINTER                    :: dft_control
     121             :       TYPE(linres_control_type), POINTER                 :: linres_control
     122          44 :       TYPE(mo_set_type), DIMENSION(:), POINTER           :: mos
     123             :       TYPE(mp_para_env_type), POINTER                    :: para_env
     124             :       TYPE(qs_matrix_pools_type), POINTER                :: mpools
     125             :       TYPE(section_vals_type), POINTER                   :: issc_section, lr_section
     126             : 
     127          44 :       CALL timeset(routineN, handle)
     128             :       !
     129          44 :       NULLIFY (dft_control, linres_control, lr_section, issc_section)
     130          44 :       NULLIFY (logger, mpools, mo_coeff, para_env)
     131          44 :       NULLIFY (tmp_fm_struct, psi1_fc, psi1_efg, psi1_pso, pso_psi0, fc_psi0, efg_psi0)
     132             : 
     133          44 :       logger => cp_get_default_logger()
     134          44 :       lr_section => section_vals_get_subs_vals(qs_env%input, "PROPERTIES%LINRES")
     135             :       issc_section => section_vals_get_subs_vals(qs_env%input, &
     136          44 :                                                  "PROPERTIES%LINRES%SPINSPIN")
     137             : 
     138             :       output_unit = cp_print_key_unit_nr(logger, lr_section, "PRINT%PROGRAM_RUN_INFO", &
     139          44 :                                          extension=".linresLog")
     140          44 :       IF (output_unit > 0) THEN
     141             :          WRITE (UNIT=output_unit, FMT="(T10,A,/)") &
     142          22 :             "*** Self consistent optimization of the response wavefunctions ***"
     143             :       END IF
     144             : 
     145             :       CALL get_qs_env(qs_env=qs_env, &
     146             :                       dft_control=dft_control, &
     147             :                       mpools=mpools, &
     148             :                       linres_control=linres_control, &
     149             :                       mos=mos, &
     150          44 :                       para_env=para_env)
     151             : 
     152          44 :       nspins = dft_control%nspins
     153             : 
     154             :       CALL get_issc_env(issc_env=issc_env, &
     155             :                         !list_cubes=list_cubes, &
     156             :                         psi1_efg=psi1_efg, &
     157             :                         psi1_pso=psi1_pso, &
     158             :                         psi1_dso=psi1_dso, &
     159             :                         psi1_fc=psi1_fc, &
     160             :                         efg_psi0=efg_psi0, &
     161             :                         pso_psi0=pso_psi0, &
     162             :                         dso_psi0=dso_psi0, &
     163             :                         fc_psi0=fc_psi0, &
     164             :                         do_fc=do_fc, &
     165             :                         do_sd=do_sd, &
     166             :                         do_pso=do_pso, &
     167          44 :                         do_dso=do_dso)
     168             :       !
     169             :       ! allocate the vectors
     170         180 :       ALLOCATE (psi0_order(nspins))
     171         228 :       ALLOCATE (psi1(nspins), h1_psi0(nspins))
     172          92 :       DO ispin = 1, nspins
     173          48 :          CALL get_mo_set(mo_set=mos(ispin), mo_coeff=mo_coeff)
     174          48 :          psi0_order(ispin) = mo_coeff
     175          48 :          CALL cp_fm_get_info(mo_coeff, ncol_global=nmo, nrow_global=nao)
     176          48 :          NULLIFY (tmp_fm_struct)
     177             :          CALL cp_fm_struct_create(tmp_fm_struct, nrow_global=nao, &
     178             :                                   ncol_global=nmo, &
     179          48 :                                   context=mo_coeff%matrix_struct%context)
     180          48 :          CALL cp_fm_create(psi1(ispin), tmp_fm_struct)
     181          48 :          CALL cp_fm_create(h1_psi0(ispin), tmp_fm_struct)
     182         140 :          CALL cp_fm_struct_release(tmp_fm_struct)
     183             :       END DO
     184          44 :       chk = 0.0_dp
     185          44 :       should_stop = .FALSE.
     186             :       !
     187             :       ! operator efg
     188          44 :       IF (do_sd) THEN
     189             :          ijdir = 0
     190           0 :          DO idir = 1, 3
     191           0 :          DO jdir = idir, 3
     192           0 :             ijdir = ijdir + 1
     193           0 :             DO ispin = 1, nspins
     194           0 :                CALL cp_fm_set_all(psi1_efg(ispin, ijdir), 0.0_dp)
     195             :             END DO
     196           0 :             IF (output_unit > 0) THEN
     197           0 :                WRITE (output_unit, "(T10,A)") "Response to the perturbation operator efg_"//ACHAR(idir + 119)//ACHAR(jdir + 119)
     198             :             END IF
     199             :             !
     200             :             !Initial guess for psi1
     201           0 :             DO ispin = 1, nspins
     202           0 :                CALL cp_fm_set_all(psi1(ispin), 0.0_dp)
     203             :                !CALL cp_fm_to_fm(p_psi0(ispin,ijdir)%matrix, psi1(ispin))
     204             :                !CALL cp_fm_scale(-1.0_dp,psi1(ispin))
     205             :             END DO
     206             :             !
     207             :             !DO scf cycle to optimize psi1
     208           0 :             DO ispin = 1, nspins
     209           0 :                CALL cp_fm_to_fm(efg_psi0(ispin, ijdir), h1_psi0(ispin))
     210             :             END DO
     211             :             !
     212             :             !
     213           0 :             linres_control%lr_triplet = .FALSE.
     214           0 :             linres_control%do_kernel = .FALSE.
     215           0 :             linres_control%converged = .FALSE.
     216           0 :             CALL linres_solver(p_env, qs_env, psi1, h1_psi0, psi0_order, output_unit, should_stop)
     217             :             !
     218             :             !
     219             :             ! copy the response
     220           0 :             DO ispin = 1, nspins
     221           0 :                CALL cp_fm_to_fm(psi1(ispin), psi1_efg(ispin, ijdir))
     222           0 :                fro = cp_fm_frobenius_norm(psi1(ispin))
     223           0 :                chk = chk + fro
     224             :             END DO
     225             :             !
     226             :             ! print response functions
     227             :             !IF(BTEST(cp_print_key_should_output(logger%iter_info,issc_section,&
     228             :             !     &   "PRINT%RESPONSE_FUNCTION_CUBES"),cp_p_file)) THEN
     229             :             !   ncubes = SIZE(list_cubes,1)
     230             :             !   print_key => section_vals_get_subs_vals(issc_section,"PRINT%RESPONSE_FUNCTION_CUBES")
     231             :             !   DO ispin = 1,nspins
     232             :             !      CALL qs_print_cubes(qs_env,psi1(ispin),ncubes,list_cubes,&
     233             :             !            centers_set(ispin)%array,print_key,'psi1_efg',&
     234             :             !            idir=ijdir,ispin=ispin)
     235             :             !   ENDDO ! ispin
     236             :             !ENDIF ! print response functions
     237             :             !
     238             :             !
     239           0 :             IF (output_unit > 0) THEN
     240           0 :                WRITE (output_unit, "(T10,A)") "Write the resulting psi1 in restart file... not implemented yet"
     241             :             END IF
     242             :             !
     243             :             ! Write the result in the restart file
     244             :          END DO ! jdir
     245             :          END DO ! idir
     246             :       END IF
     247             :       !
     248             :       ! operator pso
     249          44 :       IF (do_pso) THEN
     250         136 :          DO idir = 1, 3
     251         216 :             DO ispin = 1, nspins
     252         216 :                CALL cp_fm_set_all(psi1_pso(ispin, idir), 0.0_dp)
     253             :             END DO
     254         102 :             IF (output_unit > 0) THEN
     255          51 :                WRITE (output_unit, "(T10,A)") "Response to the perturbation operator pso_"//ACHAR(idir + 119)
     256             :             END IF
     257             :             !
     258             :             !Initial guess for psi1
     259         216 :             DO ispin = 1, nspins
     260         216 :                CALL cp_fm_set_all(psi1(ispin), 0.0_dp)
     261             :                !CALL cp_fm_to_fm(rxp_psi0(ispin,idir)%matrix, psi1(ispin))
     262             :                !CALL cp_fm_scale(-1.0_dp,psi1(ispin))
     263             :             END DO
     264             :             !
     265             :             !DO scf cycle to optimize psi1
     266         216 :             DO ispin = 1, nspins
     267         216 :                CALL cp_fm_to_fm(pso_psi0(ispin, idir), h1_psi0(ispin))
     268             :             END DO
     269             :             !
     270             :             !
     271         102 :             linres_control%lr_triplet = .FALSE. ! we do singlet response
     272         102 :             linres_control%do_kernel = .FALSE. ! we do uncoupled response
     273         102 :             linres_control%converged = .FALSE.
     274         102 :             CALL linres_solver(p_env, qs_env, psi1, h1_psi0, psi0_order, output_unit, should_stop)
     275             :             !
     276             :             !
     277             :             ! copy the response
     278         216 :             DO ispin = 1, nspins
     279         114 :                CALL cp_fm_to_fm(psi1(ispin), psi1_pso(ispin, idir))
     280         114 :                fro = cp_fm_frobenius_norm(psi1(ispin))
     281         216 :                chk = chk + fro
     282             :             END DO
     283             :             !
     284             :             ! print response functions
     285             :             !IF(BTEST(cp_print_key_should_output(logger%iter_info,issc_section,&
     286             :             !     &   "PRINT%RESPONSE_FUNCTION_CUBES"),cp_p_file)) THEN
     287             :             !   ncubes = SIZE(list_cubes,1)
     288             :             !   print_key => section_vals_get_subs_vals(issc_section,"PRINT%RESPONSE_FUNCTION_CUBES")
     289             :             !   DO ispin = 1,nspins
     290             :             !      CALL qs_print_cubes(qs_env,psi1(ispin),ncubes,list_cubes,&
     291             :             !           centers_set(ispin)%array,print_key,'psi1_pso',&
     292             :             !           idir=idir,ispin=ispin)
     293             :             !   ENDDO ! ispin
     294             :             !ENDIF ! print response functions
     295             :             !
     296             :             !
     297         238 :             IF (output_unit > 0) THEN
     298          51 :                WRITE (output_unit, "(T10,A)") "Write the resulting psi1 in restart file... not implemented yet"
     299             :             END IF
     300             :             !
     301             :             ! Write the result in the restart file
     302             :          END DO ! idir
     303             :       END IF
     304             :       !
     305             :       ! operator fc
     306          44 :       IF (do_fc) THEN
     307           0 :          DO ispin = 1, nspins
     308           0 :             CALL cp_fm_set_all(psi1_fc(ispin), 0.0_dp)
     309             :          END DO
     310           0 :          IF (output_unit > 0) THEN
     311           0 :             WRITE (output_unit, "(T10,A)") "Response to the perturbation operator fc"
     312             :          END IF
     313             :          !
     314             :          !Initial guess for psi1
     315           0 :          DO ispin = 1, nspins
     316           0 :             CALL cp_fm_set_all(psi1(ispin), 0.0_dp)
     317             :             !CALL cp_fm_to_fm(rxp_psi0(ispin,idir)%matrix, psi1(ispin))
     318             :             !CALL cp_fm_scale(-1.0_dp,psi1(ispin))
     319             :          END DO
     320             :          !
     321             :          !DO scf cycle to optimize psi1
     322           0 :          DO ispin = 1, nspins
     323           0 :             CALL cp_fm_to_fm(fc_psi0(ispin), h1_psi0(ispin))
     324             :          END DO
     325             :          !
     326             :          !
     327           0 :          linres_control%lr_triplet = .TRUE. ! we do triplet response
     328           0 :          linres_control%do_kernel = .TRUE. ! we do coupled response
     329           0 :          linres_control%converged = .FALSE.
     330           0 :          CALL linres_solver(p_env, qs_env, psi1, h1_psi0, psi0_order, output_unit, should_stop)
     331             :          !
     332             :          !
     333             :          ! copy the response
     334           0 :          DO ispin = 1, nspins
     335           0 :             CALL cp_fm_to_fm(psi1(ispin), psi1_fc(ispin))
     336           0 :             fro = cp_fm_frobenius_norm(psi1(ispin))
     337           0 :             chk = chk + fro
     338             :          END DO
     339             :          !
     340             :          ! print response functions
     341             :          !IF(BTEST(cp_print_key_should_output(logger%iter_info,issc_section,&
     342             :          !     &   "PRINT%RESPONSE_FUNCTION_CUBES"),cp_p_file)) THEN
     343             :          !   ncubes = SIZE(list_cubes,1)
     344             :          !   print_key => section_vals_get_subs_vals(issc_section,"PRINT%RESPONSE_FUNCTION_CUBES")
     345             :          !   DO ispin = 1,nspins
     346             :          !      CALL qs_print_cubes(qs_env,psi1(ispin),ncubes,list_cubes,&
     347             :          !           centers_set(ispin)%array,print_key,'psi1_pso',&
     348             :          !           idir=idir,ispin=ispin)
     349             :          !   ENDDO ! ispin
     350             :          !ENDIF ! print response functions
     351             :          !
     352             :          !
     353           0 :          IF (output_unit > 0) THEN
     354           0 :             WRITE (output_unit, "(T10,A)") "Write the resulting psi1 in restart file... not implemented yet"
     355             :          END IF
     356             :          !
     357             :          ! Write the result in the restart file
     358             :       END IF
     359             : 
     360             :       !>>>> debugging only
     361             :       !
     362             :       ! here we have the operator r and compute the polarizability for debugging the kernel only
     363          44 :       IF (do_dso) THEN
     364           8 :          DO idir = 1, 3
     365          12 :             DO ispin = 1, nspins
     366          12 :                CALL cp_fm_set_all(psi1_dso(ispin, idir), 0.0_dp)
     367             :             END DO
     368           6 :             IF (output_unit > 0) THEN
     369           3 :                WRITE (output_unit, "(T10,A)") "Response to the perturbation operator r_"//ACHAR(idir + 119)
     370             :             END IF
     371             :             !
     372             :             !Initial guess for psi1
     373          12 :             DO ispin = 1, nspins
     374          12 :                CALL cp_fm_set_all(psi1(ispin), 0.0_dp)
     375             :                !CALL cp_fm_to_fm(rxp_psi0(ispin,idir)%matrix, psi1(ispin))
     376             :                !CALL cp_fm_scale(-1.0_dp,psi1(ispin))
     377             :             END DO
     378             :             !
     379             :             !DO scf cycle to optimize psi1
     380          12 :             DO ispin = 1, nspins
     381          12 :                CALL cp_fm_to_fm(dso_psi0(ispin, idir), h1_psi0(ispin))
     382             :             END DO
     383             :             !
     384             :             !
     385           6 :             linres_control%lr_triplet = .FALSE. ! we do singlet response
     386           6 :             linres_control%do_kernel = .TRUE. ! we do uncoupled response
     387           6 :             linres_control%converged = .FALSE.
     388           6 :             CALL linres_solver(p_env, qs_env, psi1, h1_psi0, psi0_order, output_unit, should_stop)
     389             :             !
     390             :             !
     391             :             ! copy the response
     392          12 :             DO ispin = 1, nspins
     393           6 :                CALL cp_fm_to_fm(psi1(ispin), psi1_dso(ispin, idir))
     394           6 :                fro = cp_fm_frobenius_norm(psi1(ispin))
     395          12 :                chk = chk + fro
     396             :             END DO
     397             :             !
     398             :             ! print response functions
     399             :             !IF(BTEST(cp_print_key_should_output(logger%iter_info,issc_section,&
     400             :             !     &   "PRINT%RESPONSE_FUNCTION_CUBES"),cp_p_file)) THEN
     401             :             !   ncubes = SIZE(list_cubes,1)
     402             :             !   print_key => section_vals_get_subs_vals(issc_section,"PRINT%RESPONSE_FUNCTION_CUBES")
     403             :             !   DO ispin = 1,nspins
     404             :             !      CALL qs_print_cubes(qs_env,psi1(ispin),ncubes,list_cubes,&
     405             :             !           centers_set(ispin)%array,print_key,'psi1_pso',&
     406             :             !           idir=idir,ispin=ispin)
     407             :             !   ENDDO ! ispin
     408             :             !ENDIF ! print response functions
     409             :             !
     410             :             !
     411          14 :             IF (output_unit > 0) THEN
     412           3 :                WRITE (output_unit, "(T10,A)") "Write the resulting psi1 in restart file... not implemented yet"
     413             :             END IF
     414             :             !
     415             :             ! Write the result in the restart file
     416             :          END DO ! idir
     417             :       END IF
     418             :       !<<<< debugging only
     419             : 
     420             :       !
     421             :       !
     422             :       ! print the checksum
     423          44 :       IF (output_unit > 0) THEN
     424          22 :          WRITE (output_unit, '(T2,A,E23.16)') 'ISSC| response: CheckSum =', chk
     425             :       END IF
     426             :       !
     427             :       !
     428             :       ! clean up
     429          44 :       CALL cp_fm_release(psi1)
     430          44 :       CALL cp_fm_release(h1_psi0)
     431          44 :       DEALLOCATE (psi0_order)
     432             :       !
     433             :       CALL cp_print_key_finished_output(output_unit, logger, lr_section,&
     434          44 :            &                            "PRINT%PROGRAM_RUN_INFO")
     435             :       !
     436          44 :       CALL timestop(handle)
     437             :       !
     438          88 :    END SUBROUTINE issc_response
     439             : 
     440             : ! **************************************************************************************************
     441             : !> \brief ...
     442             : !> \param issc_env ...
     443             : !> \param qs_env ...
     444             : !> \param iatom ...
     445             : ! **************************************************************************************************
     446          44 :    SUBROUTINE issc_issc(issc_env, qs_env, iatom)
     447             : 
     448             :       TYPE(issc_env_type)                                :: issc_env
     449             :       TYPE(qs_environment_type), POINTER                 :: qs_env
     450             :       INTEGER, INTENT(IN)                                :: iatom
     451             : 
     452             :       CHARACTER(LEN=*), PARAMETER                        :: routineN = 'issc_issc'
     453             : 
     454             :       INTEGER                                            :: handle, ispin, ixyz, jatom, jxyz, natom, &
     455             :                                                             nmo, nspins
     456             :       LOGICAL                                            :: do_dso, do_fc, do_pso, do_sd, gapw
     457             :       REAL(dp)                                           :: buf, facdso, facfc, facpso, facsd, g, &
     458             :                                                             issc_dso, issc_fc, issc_pso, issc_sd, &
     459             :                                                             maxocc
     460             :       REAL(dp), DIMENSION(3)                             :: r_i, r_j
     461          44 :       REAL(dp), DIMENSION(:, :, :, :, :), POINTER        :: issc
     462             :       TYPE(cell_type), POINTER                           :: cell
     463          44 :       TYPE(cp_fm_type), DIMENSION(:), POINTER            :: fc_psi0, psi1_fc
     464          44 :       TYPE(cp_fm_type), DIMENSION(:, :), POINTER         :: psi1_dso, psi1_efg, psi1_pso
     465             :       TYPE(cp_fm_type), POINTER                          :: mo_coeff
     466          44 :       TYPE(dbcsr_p_type), DIMENSION(:), POINTER          :: matrix_dso, matrix_efg, matrix_fc, &
     467          44 :                                                             matrix_pso
     468             :       TYPE(dft_control_type), POINTER                    :: dft_control
     469          44 :       TYPE(mo_set_type), DIMENSION(:), POINTER           :: mos
     470          44 :       TYPE(particle_type), DIMENSION(:), POINTER         :: particle_set
     471             :       TYPE(section_vals_type), POINTER                   :: issc_section
     472             : 
     473          44 :       CALL timeset(routineN, handle)
     474             : 
     475          44 :       NULLIFY (cell, dft_control, particle_set, issc, psi1_fc, psi1_efg, psi1_pso)
     476          44 :       NULLIFY (matrix_efg, matrix_fc, matrix_pso, mos, mo_coeff, fc_psi0)
     477             : 
     478             :       CALL get_qs_env(qs_env=qs_env, &
     479             :                       cell=cell, &
     480             :                       dft_control=dft_control, &
     481             :                       particle_set=particle_set, &
     482          44 :                       mos=mos)
     483             : 
     484          44 :       gapw = dft_control%qs_control%gapw
     485          44 :       natom = SIZE(particle_set, 1)
     486          44 :       nspins = dft_control%nspins
     487             : 
     488             :       CALL get_issc_env(issc_env=issc_env, &
     489             :                         matrix_efg=matrix_efg, &
     490             :                         matrix_pso=matrix_pso, &
     491             :                         matrix_fc=matrix_fc, &
     492             :                         matrix_dso=matrix_dso, &
     493             :                         psi1_fc=psi1_fc, &
     494             :                         psi1_efg=psi1_efg, &
     495             :                         psi1_pso=psi1_pso, &
     496             :                         psi1_dso=psi1_dso, &
     497             :                         fc_psi0=fc_psi0, &
     498             :                         issc=issc, &
     499             :                         do_fc=do_fc, &
     500             :                         do_sd=do_sd, &
     501             :                         do_pso=do_pso, &
     502          44 :                         do_dso=do_dso)
     503             : 
     504          44 :       g = e_mass/(2.0_dp*p_mass)
     505          44 :       facfc = hertz*g**2*a_fine**4
     506          44 :       facpso = hertz*g**2*a_fine**4
     507          44 :       facsd = hertz*g**2*a_fine**4
     508          44 :       facdso = hertz*g**2*a_fine**4
     509             : 
     510             :       !
     511             :       !
     512             :       issc_section => section_vals_get_subs_vals(qs_env%input, &
     513          44 :            & "PROPERTIES%LINRES%SPINSPIN")
     514             :       !
     515             :       ! Initialize
     516          92 :       DO ispin = 1, nspins
     517          48 :          CALL get_mo_set(mo_set=mos(ispin), mo_coeff=mo_coeff, maxocc=maxocc)
     518          48 :          CALL cp_fm_get_info(mo_coeff, ncol_global=nmo)
     519             : 
     520         292 :          DO jatom = 1, natom
     521         800 :             r_i = particle_set(iatom)%r
     522         800 :             r_j = particle_set(jatom)%r
     523         800 :             r_j = pbc(r_i, r_j, cell) + r_i
     524             :             !
     525             :             !
     526             :             !
     527             :             !write(*,*) 'iatom =',iatom,' r_i=',r_i
     528             :             !write(*,*) 'jatom =',jatom,' r_j=',r_j
     529             :             !
     530             :             ! FC term
     531             :             !
     532         200 :             IF (do_fc .AND. iatom .NE. jatom) THEN
     533             :                !
     534             :                ! build the integral for the jatom
     535           0 :                CALL dbcsr_set(matrix_fc(1)%matrix, 0.0_dp)
     536           0 :                CALL build_fermi_contact_matrix(qs_env, matrix_fc, r_j)
     537             :                CALL cp_dbcsr_sm_fm_multiply(matrix_fc(1)%matrix, mo_coeff, &
     538             :                                       fc_psi0(ispin), ncol=nmo,& ! fc_psi0 a buffer
     539           0 :                     &                 alpha=1.0_dp)
     540             : 
     541           0 :                CALL cp_fm_trace(fc_psi0(ispin), mo_coeff, buf)
     542           0 :                WRITE (*, *) ' jatom', jatom, 'tr(P*fc)=', buf
     543             : 
     544           0 :                CALL cp_fm_trace(fc_psi0(ispin), psi1_fc(ispin), buf)
     545           0 :                issc_fc = 2.0_dp*2.0_dp*maxocc*facfc*buf
     546           0 :                issc(1, 1, iatom, jatom, 1) = issc(1, 1, iatom, jatom, 1) + issc_fc
     547           0 :                issc(2, 2, iatom, jatom, 1) = issc(2, 2, iatom, jatom, 1) + issc_fc
     548           0 :                issc(3, 3, iatom, jatom, 1) = issc(3, 3, iatom, jatom, 1) + issc_fc
     549             :             END IF
     550             :             !
     551             :             ! SD term
     552             :             !
     553         200 :             IF (do_sd .AND. iatom .NE. jatom) THEN
     554             :                !
     555             :                ! build the integral for the jatom
     556           0 :                CALL dbcsr_set(matrix_efg(1)%matrix, 0.0_dp)
     557           0 :                CALL dbcsr_set(matrix_efg(2)%matrix, 0.0_dp)
     558           0 :                CALL dbcsr_set(matrix_efg(3)%matrix, 0.0_dp)
     559           0 :                CALL dbcsr_set(matrix_efg(4)%matrix, 0.0_dp)
     560           0 :                CALL dbcsr_set(matrix_efg(5)%matrix, 0.0_dp)
     561           0 :                CALL dbcsr_set(matrix_efg(6)%matrix, 0.0_dp)
     562           0 :                CALL build_efg_matrix(qs_env, matrix_efg, r_j)
     563           0 :                DO ixyz = 1, 6
     564             :                   CALL cp_dbcsr_sm_fm_multiply(matrix_efg(ixyz)%matrix, mo_coeff, &
     565             :                                          fc_psi0(ispin), ncol=nmo,& ! fc_psi0 a buffer
     566           0 :                        &                 alpha=1.0_dp, beta=0.0_dp)
     567           0 :                   CALL cp_fm_trace(fc_psi0(ispin), mo_coeff, buf)
     568           0 :                   WRITE (*, *) ' jatom', jatom, ixyz, 'tr(P*efg)=', buf
     569           0 :                   DO jxyz = 1, 6
     570           0 :                      CALL cp_fm_trace(fc_psi0(ispin), psi1_efg(ispin, jxyz), buf)
     571           0 :                      issc_sd = 2.0_dp*maxocc*facsd*buf
     572             :                      !issc(ixyz,jxyz,iatom,jatom) = issc_sd
     573             :                      !write(*,*) 'pso_',ixyz,jxyz,' iatom',iatom,'jatom',jatom,issc_pso
     574             :                   END DO
     575             :                END DO
     576             :             END IF
     577             :             !
     578             :             ! PSO term
     579             :             !
     580         200 :             IF (do_pso .AND. iatom .NE. jatom) THEN
     581             :                !
     582             :                ! build the integral for the jatom
     583         128 :                CALL dbcsr_set(matrix_pso(1)%matrix, 0.0_dp)
     584         128 :                CALL dbcsr_set(matrix_pso(2)%matrix, 0.0_dp)
     585         128 :                CALL dbcsr_set(matrix_pso(3)%matrix, 0.0_dp)
     586         128 :                CALL build_pso_matrix(qs_env, matrix_pso, r_j)
     587         512 :                DO ixyz = 1, 3
     588             :                   CALL cp_dbcsr_sm_fm_multiply(matrix_pso(ixyz)%matrix, mo_coeff, &
     589             :                                          fc_psi0(ispin), ncol=nmo,& ! fc_psi0 a buffer
     590         384 :                        &                 alpha=1.0_dp, beta=0.0_dp)
     591        1664 :                   DO jxyz = 1, 3
     592        1152 :                      CALL cp_fm_trace(fc_psi0(ispin), psi1_pso(ispin, jxyz), buf)
     593        1152 :                      issc_pso = -2.0_dp*maxocc*facpso*buf
     594        1536 :                      issc(ixyz, jxyz, iatom, jatom, 3) = issc(ixyz, jxyz, iatom, jatom, 3) + issc_pso
     595             :                   END DO
     596             :                END DO
     597             :             END IF
     598             :             !
     599             :             ! DSO term
     600             :             !
     601             :             !>>>>> for debugging we compute here the polarizability and NOT the DSO term!
     602         248 :             IF (do_dso .AND. iatom .EQ. natom .AND. jatom .EQ. natom) THEN
     603             :                !
     604             :                ! build the integral for the jatom
     605             :                !CALL dbcsr_set(matrix_dso(1)%matrix,0.0_dp)
     606             :                !CALL dbcsr_set(matrix_dso(2)%matrix,0.0_dp)
     607             :                !CALL dbcsr_set(matrix_dso(3)%matrix,0.0_dp)
     608             :                !CALL dbcsr_set(matrix_dso(4)%matrix,0.0_dp)
     609             :                !CALL dbcsr_set(matrix_dso(5)%matrix,0.0_dp)
     610             :                !CALL dbcsr_set(matrix_dso(6)%matrix,0.0_dp)
     611             :                !CALL build_dso_matrix(qs_env,matrix_dso,r_i,r_j)
     612             :                !DO ixyz = 1,6
     613             :                !   CALL cp_sm_fm_multiply(matrix_dso(ixyz)%matrix,mo_coeff,&
     614             :                !        &                 fc_psi0(ispin),ncol=nmo,& ! fc_psi0 a buffer
     615             :                !        &                 alpha=1.0_dp,beta=0.0_dp)
     616             :                !   CALL cp_fm_trace(fc_psi0(ispin),mo_coeff,buf)
     617             :                !   issc_dso = 2.0_dp * maxocc * facdso * buf
     618             :                !   issc(ixyz,jxyz,iatom,jatom,4) = issc_dso
     619             :                !ENDDO
     620             :                !CALL dbcsr_set(matrix_dso(1)%matrix,0.0_dp)
     621             :                !CALL dbcsr_set(matrix_dso(2)%matrix,0.0_dp)
     622             :                !CALL dbcsr_set(matrix_dso(3)%matrix,0.0_dp)
     623             :                !CALL rRc_xyz_ao(matrix_dso,qs_env,(/0.0_dp,0.0_dp,0.0_dp/),1)
     624           8 :                DO ixyz = 1, 3
     625             :                   CALL cp_dbcsr_sm_fm_multiply(matrix_dso(ixyz)%matrix, mo_coeff, &
     626             :                                          fc_psi0(ispin), ncol=nmo,& ! fc_psi0 a buffer
     627           6 :                        &                 alpha=1.0_dp, beta=0.0_dp)
     628          26 :                   DO jxyz = 1, 3
     629          18 :                      CALL cp_fm_trace(psi1_dso(ispin, jxyz), fc_psi0(ispin), buf)
     630             :                      ! we save the polarizability for a checksum later on !
     631          18 :                      issc_dso = 2.0_dp*maxocc*buf
     632          24 :                      issc(ixyz, jxyz, iatom, jatom, 4) = issc(ixyz, jxyz, iatom, jatom, 4) + issc_dso
     633             :                   END DO
     634             :                END DO
     635             : 
     636             :             END IF
     637             :             !
     638             :          END DO ! jatom
     639             :       END DO ! ispin
     640             :       !
     641             :       !
     642             :       ! Finalize
     643          44 :       CALL timestop(handle)
     644             :       !
     645          44 :    END SUBROUTINE issc_issc
     646             : 
     647             : ! **************************************************************************************************
     648             : !> \brief ...
     649             : !> \param issc_env ...
     650             : !> \param qs_env ...
     651             : ! **************************************************************************************************
     652          12 :    SUBROUTINE issc_print(issc_env, qs_env)
     653             :       TYPE(issc_env_type)                                :: issc_env
     654             :       TYPE(qs_environment_type), POINTER                 :: qs_env
     655             : 
     656             :       CHARACTER(LEN=2)                                   :: element_symbol_i, element_symbol_j
     657             :       CHARACTER(LEN=default_string_length)               :: name_i, name_j, title
     658             :       INTEGER                                            :: iatom, jatom, natom, output_unit, &
     659             :                                                             unit_atoms
     660             :       LOGICAL                                            :: do_dso, do_fc, do_pso, do_sd, gapw
     661             :       REAL(dp)                                           :: eig(3), issc_iso_dso, issc_iso_fc, &
     662             :                                                             issc_iso_pso, issc_iso_sd, &
     663             :                                                             issc_iso_tot, issc_tmp(3, 3)
     664          12 :       REAL(dp), DIMENSION(:, :, :, :, :), POINTER        :: issc
     665             :       REAL(dp), EXTERNAL                                 :: DDOT
     666             :       TYPE(atomic_kind_type), POINTER                    :: atom_kind_i, atom_kind_j
     667             :       TYPE(cp_logger_type), POINTER                      :: logger
     668             :       TYPE(dft_control_type), POINTER                    :: dft_control
     669          12 :       TYPE(particle_type), DIMENSION(:), POINTER         :: particle_set
     670             :       TYPE(section_vals_type), POINTER                   :: issc_section
     671             : 
     672          12 :       NULLIFY (logger, particle_set, atom_kind_i, atom_kind_j, dft_control)
     673             : 
     674          24 :       logger => cp_get_default_logger()
     675          12 :       output_unit = cp_logger_get_default_io_unit(logger)
     676             : 
     677             :       issc_section => section_vals_get_subs_vals(qs_env%input, &
     678          12 :                                                  "PROPERTIES%LINRES%SPINSPIN")
     679             : 
     680             :       CALL get_issc_env(issc_env=issc_env, &
     681             :                         issc=issc, &
     682             :                         do_fc=do_fc, &
     683             :                         do_sd=do_sd, &
     684             :                         do_pso=do_pso, &
     685          12 :                         do_dso=do_dso)
     686             :       !
     687             :       CALL get_qs_env(qs_env=qs_env, &
     688             :                       dft_control=dft_control, &
     689          12 :                       particle_set=particle_set)
     690             : 
     691          12 :       natom = SIZE(particle_set, 1)
     692          12 :       gapw = dft_control%qs_control%gapw
     693             : 
     694             :       !
     695          12 :       IF (output_unit > 0) THEN
     696           6 :          WRITE (output_unit, '(T2,A,E14.6)') 'ISSC| CheckSum K =', &
     697          42 :             SQRT(DDOT(SIZE(issc), issc, 1, issc, 1))
     698             :       END IF
     699             :       !
     700          12 :       IF (BTEST(cp_print_key_should_output(logger%iter_info, issc_section, &
     701             :                                            "PRINT%K_MATRIX"), cp_p_file)) THEN
     702             : 
     703             :          unit_atoms = cp_print_key_unit_nr(logger, issc_section, "PRINT%K_MATRIX", &
     704          12 :                                            extension=".data", middle_name="K", log_filename=.FALSE.)
     705             : 
     706          12 :          IF (unit_atoms > 0) THEN
     707           6 :             WRITE (unit_atoms, *)
     708           6 :             WRITE (unit_atoms, *)
     709           6 :             WRITE (title, '(A)') "Indirect spin-spin coupling matrix"
     710           6 :             WRITE (unit_atoms, '(T2,A)') title
     711          28 :             DO iatom = 1, natom
     712          22 :                atom_kind_i => particle_set(iatom)%atomic_kind
     713          22 :                CALL get_atomic_kind(atom_kind_i, name=name_i, element_symbol=element_symbol_i)
     714         124 :                DO jatom = 1, natom
     715          96 :                   atom_kind_j => particle_set(jatom)%atomic_kind
     716          96 :                   CALL get_atomic_kind(atom_kind_j, name=name_j, element_symbol=element_symbol_j)
     717             :                   !
     718          96 :                   IF (iatom .EQ. jatom .AND. .NOT. do_dso) CYCLE
     719             :                   !
     720             :                   !
     721             :                   ! FC
     722         975 :                   issc_tmp(:, :) = issc(:, :, iatom, jatom, 1)
     723        1875 :                   issc_tmp(:, :) = 0.5_dp*(issc_tmp(:, :) + TRANSPOSE(issc_tmp(:, :)))
     724          75 :                   CALL diamat_all(issc_tmp, eig)
     725          75 :                   issc_iso_fc = (eig(1) + eig(2) + eig(3))/3.0_dp
     726             :                   !
     727             :                   ! SD
     728         975 :                   issc_tmp(:, :) = issc(:, :, iatom, jatom, 2)
     729        1875 :                   issc_tmp(:, :) = 0.5_dp*(issc_tmp(:, :) + TRANSPOSE(issc_tmp(:, :)))
     730          75 :                   CALL diamat_all(issc_tmp, eig)
     731          75 :                   issc_iso_sd = (eig(1) + eig(2) + eig(3))/3.0_dp
     732             :                   !
     733             :                   ! PSO
     734         975 :                   issc_tmp(:, :) = issc(:, :, iatom, jatom, 3)
     735        1875 :                   issc_tmp(:, :) = 0.5_dp*(issc_tmp(:, :) + TRANSPOSE(issc_tmp(:, :)))
     736          75 :                   CALL diamat_all(issc_tmp, eig)
     737          75 :                   issc_iso_pso = (eig(1) + eig(2) + eig(3))/3.0_dp
     738             :                   !
     739             :                   ! DSO
     740         975 :                   issc_tmp(:, :) = issc(:, :, iatom, jatom, 4)
     741        1875 :                   issc_tmp(:, :) = 0.5_dp*(issc_tmp(:, :) + TRANSPOSE(issc_tmp(:, :)))
     742          75 :                   CALL diamat_all(issc_tmp, eig)
     743          75 :                   issc_iso_dso = (eig(1) + eig(2) + eig(3))/3.0_dp
     744             :                   !
     745             :                   ! TOT
     746          75 :                   issc_iso_tot = issc_iso_fc + issc_iso_sd + issc_iso_dso + issc_iso_pso
     747             :                   !
     748             :                   !
     749          75 :                   WRITE (unit_atoms, *)
     750          75 :                   WRITE (unit_atoms, '(T2,2(A,I5,A,2X,A2))') 'Indirect spin-spin coupling between ', &
     751          75 :                      iatom, TRIM(name_i), element_symbol_i, ' and ', &
     752         150 :                      jatom, TRIM(name_j), element_symbol_j
     753             :                   !
     754          75 :                   IF (do_fc) WRITE (unit_atoms, '(T1,A,f12.4,A)') ' Isotropic FC contribution  = ', issc_iso_fc, ' Hz'
     755          75 :                   IF (do_sd) WRITE (unit_atoms, '(T1,A,f12.4,A)') ' Isotropic SD contribution  = ', issc_iso_sd, ' Hz'
     756          75 :                   IF (do_pso) WRITE (unit_atoms, '(T1,A,f12.4,A)') ' Isotropic PSO contribution = ', issc_iso_pso, ' Hz'
     757             :                   !IF(do_dso) WRITE(unit_atoms,'(T1,A,f12.4,A)') ' Isotropic DSO contribution = ',issc_iso_dso,' Hz'
     758          75 :                   IF (do_dso) WRITE (unit_atoms, '(T1,A,f12.4,A)') ' !!! POLARIZABILITY (for the moment) = ', issc_iso_dso, ' Hz'
     759          97 :                   IF (.NOT. do_dso) WRITE (unit_atoms, '(T1,A,f12.4,A)') ' Isotropic coupling         = ', issc_iso_tot, ' Hz'
     760             :                END DO
     761             :             END DO
     762             :          END IF
     763             :          CALL cp_print_key_finished_output(unit_atoms, logger, issc_section,&
     764          12 :               &                            "PRINT%K_MATRIX")
     765             :       END IF
     766             :       !
     767             :       !
     768          12 :    END SUBROUTINE issc_print
     769             : 
     770             : ! **************************************************************************************************
     771             : !> \brief Initialize the issc environment
     772             : !> \param issc_env ...
     773             : !> \param qs_env ...
     774             : ! **************************************************************************************************
     775          12 :    SUBROUTINE issc_env_init(issc_env, qs_env)
     776             :       !
     777             :       TYPE(issc_env_type)                                :: issc_env
     778             :       TYPE(qs_environment_type), POINTER                 :: qs_env
     779             : 
     780             :       CHARACTER(LEN=*), PARAMETER                        :: routineN = 'issc_env_init'
     781             : 
     782             :       INTEGER                                            :: handle, iatom, idir, ini, ir, ispin, &
     783             :                                                             istat, m, n, n_rep, nao, natom, &
     784             :                                                             nspins, output_unit
     785          12 :       INTEGER, ALLOCATABLE, DIMENSION(:)                 :: first_sgf, last_sgf
     786          12 :       INTEGER, DIMENSION(:), POINTER                     :: list, row_blk_sizes
     787             :       LOGICAL                                            :: gapw
     788             :       TYPE(cp_fm_struct_type), POINTER                   :: tmp_fm_struct
     789             :       TYPE(cp_fm_type), POINTER                          :: mo_coeff
     790             :       TYPE(cp_logger_type), POINTER                      :: logger
     791             :       TYPE(dbcsr_distribution_type), POINTER             :: dbcsr_dist
     792             :       TYPE(dft_control_type), POINTER                    :: dft_control
     793             :       TYPE(linres_control_type), POINTER                 :: linres_control
     794          12 :       TYPE(mo_set_type), DIMENSION(:), POINTER           :: mos
     795             :       TYPE(neighbor_list_set_p_type), DIMENSION(:), &
     796          12 :          POINTER                                         :: sab_orb
     797          12 :       TYPE(particle_type), DIMENSION(:), POINTER         :: particle_set
     798          12 :       TYPE(qs_kind_type), DIMENSION(:), POINTER          :: qs_kind_set
     799             :       TYPE(section_vals_type), POINTER                   :: issc_section, lr_section
     800             : 
     801             : !
     802             : 
     803          12 :       CALL timeset(routineN, handle)
     804             : 
     805          12 :       NULLIFY (linres_control)
     806          12 :       NULLIFY (logger, issc_section)
     807          12 :       NULLIFY (tmp_fm_struct)
     808          12 :       NULLIFY (particle_set, qs_kind_set)
     809          12 :       NULLIFY (sab_orb)
     810             : 
     811          12 :       logger => cp_get_default_logger()
     812          12 :       lr_section => section_vals_get_subs_vals(qs_env%input, "PROPERTIES%LINRES")
     813             : 
     814             :       output_unit = cp_print_key_unit_nr(logger, lr_section, "PRINT%PROGRAM_RUN_INFO", &
     815          12 :                                          extension=".linresLog")
     816             : 
     817          12 :       CALL issc_env_cleanup(issc_env)
     818             : 
     819          12 :       IF (output_unit > 0) THEN
     820           6 :          WRITE (output_unit, "(/,T20,A,/)") "*** Start indirect spin-spin coupling Calculation ***"
     821           6 :          WRITE (output_unit, "(T10,A,/)") "Inizialization of the ISSC environment"
     822             :       END IF
     823             : 
     824             :       issc_section => section_vals_get_subs_vals(qs_env%input, &
     825          12 :            &          "PROPERTIES%LINRES%SPINSPIN")
     826             :       !CALL section_vals_val_get(nmr_section,"INTERPOLATE_SHIFT",l_val=nmr_env%interpolate_shift)
     827             :       !CALL section_vals_val_get(nmr_section,"SHIFT_GAPW_RADIUS",r_val=nmr_env%shift_gapw_radius)
     828             : 
     829             :       CALL get_qs_env(qs_env=qs_env, &
     830             :                       dft_control=dft_control, &
     831             :                       linres_control=linres_control, &
     832             :                       mos=mos, &
     833             :                       sab_orb=sab_orb, &
     834             :                       particle_set=particle_set, &
     835             :                       qs_kind_set=qs_kind_set, &
     836          12 :                       dbcsr_dist=dbcsr_dist)
     837             :       !
     838             :       !
     839          12 :       gapw = dft_control%qs_control%gapw
     840          12 :       nspins = dft_control%nspins
     841          12 :       natom = SIZE(particle_set, 1)
     842             :       !
     843             :       ! check that the psi0 are localized and you have all the centers
     844          12 :       IF (.NOT. linres_control%localized_psi0) &
     845             :          CALL cp_warn(__LOCATION__, 'To get indirect spin-spin coupling parameters within '// &
     846           0 :                       'PBC you need to localize zero order orbitals')
     847             :       !
     848             :       !
     849             :       ! read terms need to be calculated
     850             :       ! FC
     851          12 :       CALL section_vals_val_get(issc_section, "DO_FC", l_val=issc_env%do_fc)
     852             :       ! SD
     853          12 :       CALL section_vals_val_get(issc_section, "DO_SD", l_val=issc_env%do_sd)
     854             :       ! PSO
     855          12 :       CALL section_vals_val_get(issc_section, "DO_PSO", l_val=issc_env%do_pso)
     856             :       ! DSO
     857          12 :       CALL section_vals_val_get(issc_section, "DO_DSO", l_val=issc_env%do_dso)
     858             :       !
     859             :       !
     860             :       ! read the list of atoms on which the issc need to be calculated
     861          12 :       CALL section_vals_val_get(issc_section, "ISSC_ON_ATOM_LIST", n_rep_val=n_rep)
     862             :       !
     863             :       !
     864          12 :       NULLIFY (issc_env%issc_on_atom_list)
     865          12 :       n = 0
     866          16 :       DO ir = 1, n_rep
     867           4 :          NULLIFY (list)
     868           4 :          CALL section_vals_val_get(issc_section, "ISSC_ON_ATOM_LIST", i_rep_val=ir, i_vals=list)
     869          16 :          IF (ASSOCIATED(list)) THEN
     870           4 :             CALL reallocate(issc_env%issc_on_atom_list, 1, n + SIZE(list))
     871          14 :             DO ini = 1, SIZE(list)
     872          14 :                issc_env%issc_on_atom_list(ini + n) = list(ini)
     873             :             END DO
     874           4 :             n = n + SIZE(list)
     875             :          END IF
     876             :       END DO
     877             :       !
     878          12 :       IF (.NOT. ASSOCIATED(issc_env%issc_on_atom_list)) THEN
     879          30 :          ALLOCATE (issc_env%issc_on_atom_list(natom), STAT=istat)
     880          10 :          CPASSERT(istat .EQ. 0)
     881          44 :          DO iatom = 1, natom
     882          44 :             issc_env%issc_on_atom_list(iatom) = iatom
     883             :          END DO
     884             :       END IF
     885          12 :       issc_env%issc_natms = SIZE(issc_env%issc_on_atom_list)
     886             :       !
     887             :       !
     888             :       ! Initialize the issc tensor
     889             :       ALLOCATE (issc_env%issc(3, 3, issc_env%issc_natms, issc_env%issc_natms, 4), &
     890             :                 issc_env%issc_loc(3, 3, issc_env%issc_natms, issc_env%issc_natms, 4), &
     891          84 :                 STAT=istat)
     892          12 :       CPASSERT(istat == 0)
     893       10220 :       issc_env%issc(:, :, :, :, :) = 0.0_dp
     894       10220 :       issc_env%issc_loc(:, :, :, :, :) = 0.0_dp
     895             :       !
     896             :       ! allocation
     897             :       ALLOCATE (issc_env%efg_psi0(nspins, 6), issc_env%pso_psi0(nspins, 3), issc_env%fc_psi0(nspins), &
     898             :                 issc_env%psi1_efg(nspins, 6), issc_env%psi1_pso(nspins, 3), issc_env%psi1_fc(nspins), &
     899             :                 issc_env%dso_psi0(nspins, 3), issc_env%psi1_dso(nspins, 3), &
     900         796 :                 STAT=istat)
     901          12 :       CPASSERT(istat == 0)
     902          26 :       DO ispin = 1, nspins
     903             :          !mo_coeff => current_env%psi0_order(ispin)%matrix
     904          14 :          CALL get_mo_set(mo_set=mos(ispin), mo_coeff=mo_coeff)
     905          14 :          CALL cp_fm_get_info(mo_coeff, ncol_global=m, nrow_global=nao)
     906             : 
     907          14 :          NULLIFY (tmp_fm_struct)
     908             :          CALL cp_fm_struct_create(tmp_fm_struct, nrow_global=nao, &
     909             :                                   ncol_global=m, &
     910          14 :                                   context=mo_coeff%matrix_struct%context)
     911          98 :          DO idir = 1, 6
     912          84 :             CALL cp_fm_create(issc_env%psi1_efg(ispin, idir), tmp_fm_struct)
     913          98 :             CALL cp_fm_create(issc_env%efg_psi0(ispin, idir), tmp_fm_struct)
     914             :          END DO
     915          56 :          DO idir = 1, 3
     916          42 :             CALL cp_fm_create(issc_env%psi1_pso(ispin, idir), tmp_fm_struct)
     917          42 :             CALL cp_fm_create(issc_env%pso_psi0(ispin, idir), tmp_fm_struct)
     918          42 :             CALL cp_fm_create(issc_env%psi1_dso(ispin, idir), tmp_fm_struct)
     919          56 :             CALL cp_fm_create(issc_env%dso_psi0(ispin, idir), tmp_fm_struct)
     920             :          END DO
     921          14 :          CALL cp_fm_create(issc_env%psi1_fc(ispin), tmp_fm_struct)
     922          14 :          CALL cp_fm_create(issc_env%fc_psi0(ispin), tmp_fm_struct)
     923          40 :          CALL cp_fm_struct_release(tmp_fm_struct)
     924             :       END DO
     925             :       !
     926             :       ! prepare for allocation
     927          36 :       ALLOCATE (first_sgf(natom))
     928          24 :       ALLOCATE (last_sgf(natom))
     929             :       CALL get_particle_set(particle_set, qs_kind_set, &
     930             :                             first_sgf=first_sgf, &
     931          12 :                             last_sgf=last_sgf)
     932          24 :       ALLOCATE (row_blk_sizes(natom))
     933          12 :       CALL dbcsr_convert_offsets_to_sizes(first_sgf, row_blk_sizes, last_sgf)
     934          12 :       DEALLOCATE (first_sgf)
     935          12 :       DEALLOCATE (last_sgf)
     936             : 
     937             :       !
     938             :       ! efg, pso and fc operators
     939          12 :       CALL dbcsr_allocate_matrix_set(issc_env%matrix_efg, 6)
     940          12 :       ALLOCATE (issc_env%matrix_efg(1)%matrix)
     941             :       CALL dbcsr_create(matrix=issc_env%matrix_efg(1)%matrix, &
     942             :                         name="efg (3xx-rr)/3", &
     943             :                         dist=dbcsr_dist, matrix_type=dbcsr_type_symmetric, &
     944             :                         row_blk_size=row_blk_sizes, col_blk_size=row_blk_sizes, &
     945          12 :                         nze=0, mutable_work=.TRUE.)
     946          12 :       CALL cp_dbcsr_alloc_block_from_nbl(issc_env%matrix_efg(1)%matrix, sab_orb)
     947             : 
     948             :       ALLOCATE (issc_env%matrix_efg(2)%matrix, &
     949             :                 issc_env%matrix_efg(3)%matrix, issc_env%matrix_efg(4)%matrix, &
     950          12 :                 issc_env%matrix_efg(5)%matrix, issc_env%matrix_efg(6)%matrix)
     951             :       CALL dbcsr_copy(issc_env%matrix_efg(2)%matrix, issc_env%matrix_efg(1)%matrix, &
     952          12 :                       'efg xy')
     953             :       CALL dbcsr_copy(issc_env%matrix_efg(3)%matrix, issc_env%matrix_efg(1)%matrix, &
     954          12 :                       'efg xz')
     955             :       CALL dbcsr_copy(issc_env%matrix_efg(4)%matrix, issc_env%matrix_efg(1)%matrix, &
     956          12 :                       'efg (3yy-rr)/3')
     957             :       CALL dbcsr_copy(issc_env%matrix_efg(5)%matrix, issc_env%matrix_efg(1)%matrix, &
     958          12 :                       'efg yz')
     959             :       CALL dbcsr_copy(issc_env%matrix_efg(6)%matrix, issc_env%matrix_efg(1)%matrix, &
     960          12 :                       'efg (3zz-rr)/3')
     961             : 
     962          12 :       CALL dbcsr_set(issc_env%matrix_efg(1)%matrix, 0.0_dp)
     963          12 :       CALL dbcsr_set(issc_env%matrix_efg(2)%matrix, 0.0_dp)
     964          12 :       CALL dbcsr_set(issc_env%matrix_efg(3)%matrix, 0.0_dp)
     965          12 :       CALL dbcsr_set(issc_env%matrix_efg(4)%matrix, 0.0_dp)
     966          12 :       CALL dbcsr_set(issc_env%matrix_efg(5)%matrix, 0.0_dp)
     967          12 :       CALL dbcsr_set(issc_env%matrix_efg(6)%matrix, 0.0_dp)
     968             :       !
     969             :       ! PSO
     970          12 :       CALL dbcsr_allocate_matrix_set(issc_env%matrix_pso, 3)
     971          12 :       ALLOCATE (issc_env%matrix_pso(1)%matrix)
     972             :       CALL dbcsr_create(matrix=issc_env%matrix_pso(1)%matrix, &
     973             :                         name="pso x", &
     974             :                         dist=dbcsr_dist, matrix_type=dbcsr_type_antisymmetric, &
     975             :                         row_blk_size=row_blk_sizes, col_blk_size=row_blk_sizes, &
     976          12 :                         nze=0, mutable_work=.TRUE.)
     977          12 :       CALL cp_dbcsr_alloc_block_from_nbl(issc_env%matrix_pso(1)%matrix, sab_orb)
     978             : 
     979          12 :       ALLOCATE (issc_env%matrix_pso(2)%matrix, issc_env%matrix_pso(3)%matrix)
     980             :       CALL dbcsr_copy(issc_env%matrix_pso(2)%matrix, issc_env%matrix_pso(1)%matrix, &
     981          12 :                       'pso y')
     982             :       CALL dbcsr_copy(issc_env%matrix_pso(3)%matrix, issc_env%matrix_pso(1)%matrix, &
     983          12 :                       'pso z')
     984          12 :       CALL dbcsr_set(issc_env%matrix_pso(1)%matrix, 0.0_dp)
     985          12 :       CALL dbcsr_set(issc_env%matrix_pso(2)%matrix, 0.0_dp)
     986          12 :       CALL dbcsr_set(issc_env%matrix_pso(3)%matrix, 0.0_dp)
     987             :       !
     988             :       ! DSO
     989          12 :       CALL dbcsr_allocate_matrix_set(issc_env%matrix_dso, 3)
     990          12 :       ALLOCATE (issc_env%matrix_dso(1)%matrix, issc_env%matrix_dso(2)%matrix, issc_env%matrix_dso(3)%matrix)
     991             :       CALL dbcsr_copy(issc_env%matrix_dso(1)%matrix, issc_env%matrix_efg(1)%matrix, &
     992          12 :                       'dso x')
     993             :       CALL dbcsr_copy(issc_env%matrix_dso(2)%matrix, issc_env%matrix_efg(1)%matrix, &
     994          12 :                       'dso y')
     995             :       CALL dbcsr_copy(issc_env%matrix_dso(3)%matrix, issc_env%matrix_efg(1)%matrix, &
     996          12 :                       'dso z')
     997          12 :       CALL dbcsr_set(issc_env%matrix_dso(1)%matrix, 0.0_dp)
     998          12 :       CALL dbcsr_set(issc_env%matrix_dso(2)%matrix, 0.0_dp)
     999          12 :       CALL dbcsr_set(issc_env%matrix_dso(3)%matrix, 0.0_dp)
    1000             :       !
    1001             :       ! FC
    1002          12 :       CALL dbcsr_allocate_matrix_set(issc_env%matrix_fc, 1)
    1003          12 :       ALLOCATE (issc_env%matrix_fc(1)%matrix)
    1004             :       CALL dbcsr_copy(issc_env%matrix_fc(1)%matrix, issc_env%matrix_efg(1)%matrix, &
    1005          12 :                       'fc')
    1006          12 :       CALL dbcsr_set(issc_env%matrix_fc(1)%matrix, 0.0_dp)
    1007             : 
    1008          12 :       DEALLOCATE (row_blk_sizes)
    1009             :       !
    1010             :       ! Conversion factors
    1011          12 :       IF (output_unit > 0) THEN
    1012             :          WRITE (output_unit, "(T2,A,T60,I4,A)")&
    1013           6 :               & "ISSC| spin-spin coupling computed for ", issc_env%issc_natms, ' atoms'
    1014             :       END IF
    1015             : 
    1016             :       CALL cp_print_key_finished_output(output_unit, logger, lr_section,&
    1017          12 :            &                            "PRINT%PROGRAM_RUN_INFO")
    1018             : 
    1019          12 :       CALL timestop(handle)
    1020             : 
    1021          24 :    END SUBROUTINE issc_env_init
    1022             : 
    1023             : ! **************************************************************************************************
    1024             : !> \brief Deallocate the issc environment
    1025             : !> \param issc_env ...
    1026             : !> \par History
    1027             : ! **************************************************************************************************
    1028          24 :    SUBROUTINE issc_env_cleanup(issc_env)
    1029             : 
    1030             :       TYPE(issc_env_type), INTENT(INOUT)                 :: issc_env
    1031             : 
    1032          24 :       IF (ASSOCIATED(issc_env%issc_on_atom_list)) THEN
    1033          12 :          DEALLOCATE (issc_env%issc_on_atom_list)
    1034             :       END IF
    1035          24 :       IF (ASSOCIATED(issc_env%issc)) THEN
    1036          12 :          DEALLOCATE (issc_env%issc)
    1037             :       END IF
    1038          24 :       IF (ASSOCIATED(issc_env%issc_loc)) THEN
    1039          12 :          DEALLOCATE (issc_env%issc_loc)
    1040             :       END IF
    1041             :       !
    1042             :       !efg_psi0
    1043          24 :       CALL cp_fm_release(issc_env%efg_psi0)
    1044             :       !
    1045             :       !pso_psi0
    1046          24 :       CALL cp_fm_release(issc_env%pso_psi0)
    1047             :       !
    1048             :       !dso_psi0
    1049          24 :       CALL cp_fm_release(issc_env%dso_psi0)
    1050             :       !
    1051             :       !fc_psi0
    1052          24 :       CALL cp_fm_release(issc_env%fc_psi0)
    1053             :       !
    1054             :       !psi1_efg
    1055          24 :       CALL cp_fm_release(issc_env%psi1_efg)
    1056             :       !
    1057             :       !psi1_pso
    1058          24 :       CALL cp_fm_release(issc_env%psi1_pso)
    1059             :       !
    1060             :       !psi1_dso
    1061          24 :       CALL cp_fm_release(issc_env%psi1_dso)
    1062             :       !
    1063             :       !psi1_fc
    1064          24 :       CALL cp_fm_release(issc_env%psi1_fc)
    1065             :       !
    1066             :       !matrix_efg
    1067          24 :       IF (ASSOCIATED(issc_env%matrix_efg)) THEN
    1068          12 :          CALL dbcsr_deallocate_matrix_set(issc_env%matrix_efg)
    1069             :       END IF
    1070             :       !
    1071             :       !matrix_pso
    1072          24 :       IF (ASSOCIATED(issc_env%matrix_pso)) THEN
    1073          12 :          CALL dbcsr_deallocate_matrix_set(issc_env%matrix_pso)
    1074             :       END IF
    1075             :       !
    1076             :       !matrix_dso
    1077          24 :       IF (ASSOCIATED(issc_env%matrix_dso)) THEN
    1078          12 :          CALL dbcsr_deallocate_matrix_set(issc_env%matrix_dso)
    1079             :       END IF
    1080             :       !
    1081             :       !matrix_fc
    1082          24 :       IF (ASSOCIATED(issc_env%matrix_fc)) THEN
    1083          12 :          CALL dbcsr_deallocate_matrix_set(issc_env%matrix_fc)
    1084             :       END IF
    1085             : 
    1086          24 :    END SUBROUTINE issc_env_cleanup
    1087             : 
    1088             : END MODULE qs_linres_issc_utils

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