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xc_infos.f90
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xc_infos.f90
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!
! Copyright (C) 2021 Quantum ESPRESSO group
! This file is distributed under the terms of the
! GNU General Public License. See the file `License'
! in the root directory of the present distribution,
! or http://www.gnu.org/copyleft/gpl.txt .
!
!============================================================================
!============================================================================
PROGRAM xc_infos
!==========================================================================
!! Provides infos on the input DFTs (both QE and Libxc).
!! Currently does not cover vdW functionals.
!
! --- To be run on a single processor ---
!
USE kind_l, ONLY: DP
USE xc_lib, ONLY: xclib_set_dft_from_name, xclib_get_ID, &
xclib_dft_is_libxc, xclib_init_libxc, &
xclib_finalize_libxc, xclib_set_auxiliary_flags
USE qe_dft_list
USE qe_dft_refs
USE dft_setting_params, ONLY: ishybrid, exx_fraction, screening_parameter, &
gau_parameter
USE xclib_utils_and_para, ONLY: stdout, nowarning
#if defined(__LIBXC)
USE xc_f03_lib_m
USE dft_setting_params, ONLY: xc_func, xc_info, xc_kind_error, n_ext_params, &
par_list, libxc_flags
#endif
!
IMPLICIT NONE
!
CHARACTER(LEN=120) :: lxc_kind, lxc_family
CHARACTER(LEN=150) :: dft_r
CHARACTER(LEN=100) :: dft_w
CHARACTER(LEN=10) :: dft_n
INTEGER :: n_ext, id(6), idfull, fkind
INTEGER :: i, ii
!
!-------- Input var -----------------------
CHARACTER(LEN=80) :: dft
!
!---------- DFT infos -------------------------
INTEGER :: iexch, icorr, igcx, igcc, imeta, imetac, idx
LOGICAL :: is_libxc(6)
CHARACTER(LEN=80) :: name_check
!
dft = 'none'
!
WRITE (*,'(/,1x,a)', ADVANCE='no') "Insert DFT name: "
READ(*,'(A)') dft
!
!==========================================================================
! PRINT DFT INFOS
!==========================================================================
!
nowarning = .TRUE.
!
CALL xclib_set_dft_from_name( dft )
!
#if defined(__LIBXC)
IF ( xc_kind_error ) WRITE(stdout,*) 'WARNING: This functional includes Libxc &
&terms that are currently not usable in &
&QE (kinetic) and they will be ignored.'
#endif
!
iexch = xclib_get_ID('LDA','EXCH')
is_libxc(1) = xclib_dft_is_libxc('LDA','EXCH')
icorr = xclib_get_ID('LDA','CORR')
is_libxc(2) = xclib_dft_is_libxc('LDA','CORR')
igcx = xclib_get_ID('GGA','EXCH')
is_libxc(3) = xclib_dft_is_libxc('GGA','EXCH')
igcc = xclib_get_ID('GGA','CORR')
is_libxc(4) = xclib_dft_is_libxc('GGA','CORR')
imeta = xclib_get_ID('MGGA','EXCH')
is_libxc(5) = xclib_dft_is_libxc('MGGA','EXCH')
imetac = xclib_get_ID('MGGA','CORR')
is_libxc(6) = xclib_dft_is_libxc('MGGA','CORR')
!
id(1) = iexch ; id(2) = icorr
id(3) = igcx ; id(4) = igcc
id(5) = imeta ; id(6) = imetac
!
name_check = 'noshortname'
CALL get_shortname_from_IDs( id, name_check, idfull )
!
WRITE(stdout,*) " "
WRITE(stdout,*) "=================================== "//CHAR(10)//" "
!
IF (TRIM(name_check)/='noshortname') THEN
WRITE(stdout,*) dft_full_descr(idfull)
WRITE(stdout,*) CHAR(10)
ENDIF
!
WRITE(stdout,*) "The selected XC functional is a composition of the &
&following terms:"
WRITE(stdout,*) CHAR(10)//"LDA"
WRITE(stdout,121) iexch, TRIM(xc_library(is_libxc(1),iexch)), &
icorr, TRIM(xc_library(is_libxc(2),icorr))
WRITE(stdout,*) CHAR(10)//"GGA"
WRITE(stdout,121) igcx, TRIM(xc_library(is_libxc(3),igcx)), &
igcc, TRIM(xc_library(is_libxc(4),igcc))
WRITE(stdout,*) CHAR(10)//"MGGA"
WRITE(stdout,121) imeta, TRIM(xc_library(is_libxc(5),imeta)), &
imetac,TRIM(xc_library(is_libxc(6),imetac))
WRITE(stdout,*) " "
WRITE(stdout,*) "============== "
!
CALL xclib_set_auxiliary_flags( .FALSE. )
!
#if defined(__LIBXC)
IF (xclib_dft_is_libxc('ANY')) CALL xclib_init_libxc( 1, .FALSE. )
#endif
!
DO i = 1, 6
idx = id(i)
!
IF (.NOT.is_libxc(i) .AND. idx/=0) THEN
!
SELECT CASE( i )
CASE( 1 )
WRITE(lxc_kind, '(a)') 'EXCHANGE'
WRITE(lxc_family,'(a)') "LDA"
dft_n = dft_LDAx_name(idx)
dft_r = dft_LDAx(idx)%ref
dft_w = dft_LDAx(idx)%wrn
CASE( 2 )
WRITE(lxc_kind, '(a)') 'CORRELATION'
WRITE(lxc_family,'(a)') "LDA"
dft_n = dft_LDAc_name(idx)
dft_r = dft_LDAc(idx)%ref
dft_w = dft_LDAc(idx)%wrn
CASE( 3 )
WRITE(lxc_kind, '(a)') 'EXCHANGE'
IF (ishybrid) WRITE(lxc_family,'(a)') "Hybrid GGA"
IF (.NOT. ishybrid) WRITE(lxc_family,'(a)') "GGA"
dft_n = dft_GGAx_name(idx)
dft_r = dft_GGAx(idx)%ref
dft_w = dft_GGAx(idx)%wrn
CASE( 4 )
WRITE(lxc_kind, '(a)') 'CORRELATION'
IF (ishybrid) WRITE(lxc_family,'(a)') "Hybrid GGA"
IF (.NOT. ishybrid) WRITE(lxc_family,'(a)') "GGA"
dft_n = dft_GGAc_name(idx)
dft_r = dft_GGAc(idx)%ref
dft_w = dft_GGAc(idx)%wrn
CASE( 5 )
WRITE(lxc_kind, '(a)') 'EXCHANGE+CORRELATION'
IF (ishybrid) WRITE(lxc_family,'(a)') "Hybrid MGGA"
IF (.NOT. ishybrid) WRITE(lxc_family,'(a)') "MGGA"
dft_n = dft_MGGA_name(idx)
dft_r = dft_MGGA(idx)%ref
dft_w = dft_MGGA(idx)%wrn
END SELECT
!
WRITE(stdout,*) CHAR(10)
WRITE(*,'(i1,". Functional with ID:", i3 )') i, idx
IF (TRIM(dft_n)/='xxxx') THEN
WRITE(stdout, '(" - Name: ",a)') TRIM(dft_n)
ELSE
WRITE(stdout, '(" - Name: xxxx [",a,"]")') TRIM(dft)
ENDIF
WRITE(stdout, '(" - Family: ",a)') TRIM(lxc_family)
WRITE(stdout, '(" - Kind: ",a)') TRIM(lxc_kind)
!
WRITE(stdout, '(" - Warnings:")')
WRITE(stdout,'(a,2a)') ' ', TRIM(dft_w)
!
n_ext = 0
IF ( (ishybrid .AND. (i==1 .OR. i==3)) .OR. &
(i==3 .AND. idx==12) .OR. (i==3 .AND. idx==20) ) n_ext = 1
WRITE(stdout, '(" - External parameters:")')
IF ( n_ext/=0 ) THEN
IF ( ishybrid .AND. (i==1 .OR. i==3)) WRITE(stdout,*) ' exx_fraction (default)= ', exx_fraction
IF ( i==3 .AND. idx==12 ) WRITE(stdout,*) ' screening_parameter (default)= ',&
screening_parameter
IF ( i==3 .AND. idx==20 ) WRITE(stdout,*) ' gau_parameter (default)= ', &
gau_parameter
ELSE
WRITE(stdout, '(" none")')
ENDIF
WRITE(stdout, '(" - Reference(s):")')
WRITE(stdout,'(a,i1,2a)') ' [',1,'] ', TRIM(dft_r)
!
#if defined(__LIBXC)
!
ELSEIF (is_libxc(i)) THEN
!
fkind = xc_f03_func_info_get_kind(xc_info(i))
SELECT CASE( fkind )
CASE( XC_EXCHANGE )
WRITE(lxc_kind, '(a)') 'EXCHANGE'
CASE( XC_CORRELATION )
WRITE(lxc_kind, '(a)') 'CORRELATION'
CASE( XC_EXCHANGE_CORRELATION )
WRITE(lxc_kind, '(a)') 'EXCHANGE+CORRELATION'
CASE( XC_KINETIC )
WRITE(lxc_kind, '(a)') 'KINETIC ENERGY FUNCTIONAL - currently NOT usable&
& in QE.'
CASE DEFAULT
WRITE(lxc_kind, '(a)') 'UNKNOWN'
END SELECT
!
SELECT CASE( xc_f03_func_info_get_family(xc_info(i)) )
CASE( XC_FAMILY_LDA )
WRITE(lxc_family,'(a)') "LDA"
CASE( XC_FAMILY_HYB_LDA )
WRITE(lxc_family,'(a)') "Hybrid LDA"
CASE( XC_FAMILY_GGA )
WRITE(lxc_family,'(a)') "GGA"
CASE( XC_FAMILY_HYB_GGA )
WRITE(lxc_family,'(a)') "Hybrid GGA"
CASE( XC_FAMILY_MGGA )
WRITE(lxc_family,'(a)') "MGGA"
CASE( XC_FAMILY_HYB_MGGA )
WRITE(lxc_family,'(a)') "Hybrid MGGA"
CASE DEFAULT
WRITE(lxc_family,'(a)') "UNKNOWN"
END SELECT
!
WRITE(stdout,*) CHAR(10)
WRITE(*,'(i1,". Functional with ID: ", i3 )') i, idx
WRITE(stdout, '(" - Name: ",a)') TRIM(xc_f03_func_info_get_name(xc_info(i)))
WRITE(stdout, '(" - Family: ",a)') TRIM(lxc_family)
WRITE(stdout, '(" - Kind: ",a)') TRIM(lxc_kind)
!
IF (lxc_family(1:6)=="Hybrid" .AND. (MOD(i,2)==1 .OR. ((MOD(i,2)==0) &
.AND.fkind==XC_EXCHANGE_CORRELATION))) THEN
WRITE(stdout,*) '- Default exx fraction: ', exx_fraction
IF (screening_parameter/=0.d0) &
WRITE(stdout,*) '- Default screening parameter: ', screening_parameter
ENDIF
IF ( n_ext_params(i)/=0 ) THEN
WRITE(stdout, '(" - External parameters: ",i3)') n_ext_params(i)
DO ii = 0, n_ext_params(i)-1
WRITE(stdout, '(" ",i3,") ",a)') ii,&
TRIM(xc_f03_func_info_get_ext_params_description(xc_info(i), ii))
WRITE(stdout,*) ' Default value: ', par_list(i,ii+1)
ENDDO
ELSE
WRITE(stdout, '(" - External parameters: NONE")')
ENDIF
!
WRITE(stdout, '(" - Special warnings: ")')
IF ( libxc_flags(i,0) == 0 ) &
WRITE(stdout,'(4X,"[w00] libxc functional with ID ",I4," does not ",&
&/4X,"provide Exc.")' ) idx
IF ( libxc_flags(i,1) == 0 ) &
WRITE(stdout,'(4X,"[w01] libxc functional with ID ",I4," does not ",&
&/4X,"provide Vxc.")' ) idx
IF ( libxc_flags(i,2) == 0 ) &
WRITE(stdout,'(4X,"[w02] libxc functional with ID ",I4," does not ", &
&/4X,"provide Vxc derivative.")' ) idx
IF ( libxc_flags(i,8) == 1 ) &
WRITE(stdout,'(/5X,"WARNING: libxc functional with ID ",I4," is CAM, ", &
&/5X,"long range exx is not available yet (if needed).")' ) idx
IF ( libxc_flags(i,14) == 1 ) &
WRITE(stdout,'(4X,"[w02] libxc functional with ID ",I4," is still ", &
&/4X,"in development.")' ) idx
IF ( libxc_flags(i,15) == 1 ) &
WRITE(stdout,'(4X,"[w15] libxc functional with ID ",I4," depends on", &
&/4X," the laplacian of the density, which is currently set",&
&/4X," to zero.")' ) idx
IF ( ALL(libxc_flags(i,0:2)==1) .AND. libxc_flags(i,14)==0 .AND. libxc_flags(i,15)==0 ) &
WRITE(stdout, '(4X,"NONE")')
!
WRITE(stdout, '(" - Reference(s):")')
ii = 0
DO WHILE( ii >= 0 )
WRITE(stdout,'(a,i1,2a)') ' [',ii+1,'] ',TRIM(xc_f03_func_reference_get_ref( &
xc_f03_func_info_get_references(xc_info(i), ii)))
ENDDO
#endif
!
ENDIF
ENDDO
!
#if defined(__LIBXC)
IF (xclib_dft_is_libxc('ANY')) CALL xclib_finalize_libxc()
#endif
!
WRITE(stdout,*) CHAR(10)//" "
!
121 FORMAT( 'Exchange ID: ', i3, ', Library: ', a, ' ; Correlation ID: ', i3, ', Library: ',a )
!
STOP
!
CONTAINS
!
CHARACTER(11) FUNCTION xc_library( islibxc, idxc )
!
LOGICAL, INTENT(IN) :: islibxc
INTEGER, INTENT(IN) :: idxc
!
xc_library = ''
IF (idxc /= 0) THEN
IF ( islibxc ) THEN
xc_library = 'Libxc'
ELSE
xc_library = 'QE_internal'
ENDIF
ELSE
xc_library = 'none'
ENDIF
!
RETURN
!
END FUNCTION
!
END PROGRAM xc_infos