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https://github.com/pfloos/quack
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59 lines
1.3 KiB
Fortran
59 lines
1.3 KiB
Fortran
subroutine lda_exchange_derivative_discontinuity(DFA,nEns,wEns,aCC_w1,aCC_w2,nGrid,weight,rhow,ExDD)
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! Compute the exchange LDA part of the derivative discontinuity
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implicit none
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include 'parameters.h'
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! Input variables
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character(len=12),intent(in) :: DFA
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integer,intent(in) :: nEns
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double precision,intent(in) :: wEns(nEns)
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double precision,intent(in) :: aCC_w1(3)
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double precision,intent(in) :: aCC_w2(3)
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integer,intent(in) :: nGrid
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double precision,intent(in) :: weight(nGrid)
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double precision,intent(in) :: rhow(nGrid)
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! Local variables
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! Output variables
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double precision,intent(out) :: ExDD(nEns)
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! Select correlation functional
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select case (DFA)
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case ('US51')
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ExDD(:) = 0d0
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case ('RS51')
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ExDD(:) = 0d0
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case ('RMFL20')
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call RMFL20_lda_exchange_derivative_discontinuity(nEns,wEns,nGrid,weight(:),rhow(:),ExDD(:))
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case ('RCC')
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call RCC_lda_exchange_derivative_discontinuity(nEns,wEns,aCC_w1,aCC_w2,nGrid,weight(:),rhow(:),ExDD(:))
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case ('UCC')
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call UCC_lda_exchange_derivative_discontinuity(nEns,wEns,aCC_w1,aCC_w2,nGrid,weight(:),rhow(:),ExDD(:))
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case default
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call print_warning('!!! LDA exchange derivative discontinuity not available !!!')
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stop
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end select
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end subroutine lda_exchange_derivative_discontinuity
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