subroutine read_options_dft(nBas,method,x_rung,x_DFA,c_rung,c_DFA,SGn,nEns,wEns,nCC,aCC, & doNcentered,occnum,Cx_choice) ! Read DFT options implicit none include 'parameters.h' ! Input variables integer,intent(in) :: nBas ! Local variables integer :: iBas integer :: iEns integer :: iCC character(len=1) :: answer double precision,allocatable :: nEl(:) character(len=12) :: x_func character(len=12) :: c_func ! Output variables character(len=8),intent(out) :: method integer,intent(out) :: x_rung,c_rung integer,intent(out) :: x_DFA,c_DFA integer,intent(out) :: SGn integer,intent(out) :: nEns logical,intent(out) :: doNcentered double precision,intent(out) :: wEns(maxEns) integer,intent(out) :: nCC double precision,intent(out) :: aCC(maxCC,maxEns-1) double precision,intent(out) :: occnum(nBas,nspin,maxEns) integer,intent(out) :: Cx_choice ! Open file with method specification open(unit=1,file='input/dft') ! Default values method = 'eDFT-UKS' x_rung = 1 c_rung = 1 x_DFA = 1 c_DFA = 1 SGn = 0 wEns(:) = 0d0 ! Restricted or unrestricted calculation read(1,*) read(1,*) method !---------------------------------------! ! EXCHANGE: read rung of Jacob's ladder ! !---------------------------------------! read(1,*) read(1,*) read(1,*) read(1,*) read(1,*) read(1,*) read(1,*) x_rung,x_func select case (x_rung) ! exchange functionals case (0) ! Hartree select case (x_func) case ('H') x_DFA = 1 case default call print_warning('!!! Hartree exchange functional not available !!!') stop end select case (1) ! LDA select case (x_func) case ('S51') x_DFA = 1 case ('CC-S51') x_DFA = 2 case default call print_warning('!!! LDA exchange functional not available !!!') stop end select case (2) ! GGA select case (x_func) case ('G96') x_DFA = 1 case ('B88') x_DFA = 2 case ('PBE') x_DFA = 3 case default call print_warning('!!! GGA exchange functional not available !!!') stop end select case (3) ! MGGA select case (x_func) case default call print_warning('!!! MGGA exchange functional not available !!!') stop end select case (4) ! Hybrid select case (x_func) case ('HF') x_DFA = 1 case ('B3LYP') x_DFA = 2 case ('BHHLYP') x_DFA = 3 case ('PBE') x_DFA = 4 case default call print_warning('!!! Hybrid exchange functional not available !!!') stop end select case default call print_warning('!!! Exchange rung not available !!!') stop end select ! Select rung for exchange write(*,*) write(*,*) '*******************************************************************' write(*,*) '* Exchange rung *' write(*,*) '*******************************************************************' call select_rung(x_rung,x_func) !------------------------------------------! ! CORRELATION: read rung of Jacob's ladder ! !------------------------------------------! read(1,*) read(1,*) read(1,*) read(1,*) read(1,*) read(1,*) read(1,*) c_rung,c_func select case (c_rung) ! correlation functionals case (0) ! Hartree select case (c_func) case ('H') c_DFA = 1 case default call print_warning('!!! Hartree correlation functional not available !!!') stop end select case (1) ! LDA select case (c_func) case ('W38') c_DFA = 1 case ('PW92') c_DFA = 2 case ('VWN3') c_DFA = 3 case ('VWN5') c_DFA = 4 case ('eVWN5') c_DFA = 5 case default call print_warning('!!! LDA correlation functional not available !!!') stop end select case (2) ! GGA select case (c_func) case ('LYP') c_DFA = 1 case ('PBE') c_DFA = 2 case default call print_warning('!!! GGA correlation functional not available !!!') stop end select case (3) ! MGGA select case (c_func) case default call print_warning('!!! MGGA correlation functional not available !!!') stop end select case (4) ! Hybrid select case (c_func) case ('HF') c_DFA = 1 case ('B3LYP') c_DFA = 2 case ('BHHLYP') c_DFA = 3 case ('PBE') c_DFA = 4 case default call print_warning('!!! Hybrid correlation functional not available !!!') stop end select case default call print_warning('!!! Correlation rung not available !!!') stop end select ! Select rung for correlation write(*,*) write(*,*) '*******************************************************************' write(*,*) '* Correlation rung *' write(*,*) '*******************************************************************' call select_rung(c_rung,c_func) ! Read SG-n grid read(1,*) read(1,*) SGn ! Read number of states in ensemble read(1,*) read(1,*) nEns if(nEns.gt.maxEns) then write(*,*) ' Number of states in ensemble too big!! ' stop endif write(*,*)'----------------------------------------------------------' write(*,'(A33,I3)')' Number of states in ensemble = ',nEns write(*,*)'----------------------------------------------------------' write(*,*) ! Read occupation numbers for orbitals nO and nO+1 occnum(:,:,:) = 0d0 do iEns=1,maxEns read(1,*) read(1,*) (occnum(iBas,1,iEns),iBas=1,nBas) read(1,*) (occnum(iBas,2,iEns),iBas=1,nBas) end do do iEns=1,nEns write(*,*) write(*,*) '===============' write(*,*) 'State n.',iEns write(*,*) '===============' write(*,*) write(*,*) 'Spin-up occupation numbers' write(*,*) (int(occnum(iBas,1,iEns)),iBas=1,nBas) write(*,*) 'Spin-down occupation numbers' write(*,*) (int(occnum(iBas,2,iEns)),iBas=1,nBas) write(*,*) end do ! Read ensemble weights for real physical (fractional number of electrons) ensemble (w1,w2) allocate(nEl(maxEns)) nEl(:) = 0d0 do iEns=1,maxEns do iBas=1,nBas nEl(iEns) = nEl(iEns) + occnum(iBas,1,iEns) + occnum(iBas,2,iEns) end do end do doNcentered = .false. read(1,*) read(1,*) (wEns(iEns),iEns=2,nEns) read(1,*) read(1,*) answer if(answer == 'T') doNcentered = .true. wEns(1) = 1d0 do iEns=2,nEns wEns(1) = wEns(1) - wEns(iEns) end do if (doNcentered) then do iEns=2,nEns wEns(iEns) = (nEl(1)/nEl(iEns))*wEns(iEns) end do end if write(*,*)'----------------------------------------------------------' write(*,*)' Ensemble weights ' write(*,*)'----------------------------------------------------------' call matout(nEns,1,wEns) write(*,*) ! Read parameters for weight-dependent functional read(1,*) read(1,*) nCC do iEns=2,nEns read(1,*) (aCC(iCC,iEns-1),iCC=1,nCC) end do ! Read choice of exchange coefficient read(1,*) read(1,*) Cx_choice write(*,*)'----------------------------------------------------------' write(*,*)' Parameters for weight-dependent exchange functional ' write(*,*)'----------------------------------------------------------' do iEns=2,nEns write(*,'(A6,I2,A2)') 'State ',iEns,':' do iCC=1,nCC write(*,'(I2,F10.6)') iCC,aCC(iCC,iEns-1) end do end do write(*,*) ! Close file with options close(unit=1) end subroutine read_options_dft