216 lines
5.1 KiB
Fortran
216 lines
5.1 KiB
Fortran
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!
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!=======================================================================
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!
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MODULE PLASMON_ENE_SI
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!
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! This modules defines the plasmon energy
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!
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! --> SI version <--
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!
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USE ACCURACY_REAL
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!
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IMPLICIT NONE
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!
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REAL (WP) :: ENE_P_SI
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!
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END MODULE PLASMON_ENE_SI
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!
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!=======================================================================
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!
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MODULE PLASMON_ENE_EV
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!
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! This modules defines the plasmon energy
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!
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! --> eV version <--
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!
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USE ACCURACY_REAL
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!
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IMPLICIT NONE
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!
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REAL (WP) :: ENE_P_EV
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!
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END MODULE PLASMON_ENE_EV
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!
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!=======================================================================
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!
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MODULE PLASMON_SCALE_P
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!
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! This modules defines the plasmon scale parameters
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!
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!
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USE ACCURACY_REAL
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!
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IMPLICIT NONE
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!
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REAL (WP) :: NONID,DEGEN
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!
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END MODULE PLASMON_SCALE_P
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!
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!=======================================================================
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!
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MODULE PLASMON_ENE
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!
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! This modules computes the plasmon energy
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!
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! --> SI version <--
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!
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!
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CONTAINS
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!
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!
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!=======================================================================
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!
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SUBROUTINE CALC_PLASMON_ENE
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!
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USE MATERIAL_PROP, ONLY : RS,DMN
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USE ENE_CHANGE, ONLY : EV
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!
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USE PLASMON_ENE_SI
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USE PLASMON_ENE_EV
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!
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IMPLICIT NONE
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!
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CALL PLASMON_ENERGY(DMN,RS,ENE_P_SI) !
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!
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ENE_P_EV = ENE_P_SI / EV !
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!
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END SUBROUTINE CALC_PLASMON_ENE
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!
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!=======================================================================
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!
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SUBROUTINE PLASMON_ENERGY(DMN,RS,ENE_P_SI)
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!
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! This subroutine calculates the plasmon energy at q = 0
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! for all dimensionalities
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!
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! Important note: In 2D and 1D, the plasmon energy is q-dependent. We
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! have removed here this q-dependency. In reality, OMEGA_P is zero
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! in 2D and 1D for q = 0
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!
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! Input parameters:
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!
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! * DMN : problem dimension
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! DIM = '3D'
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! DIM = '2D'
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! DIM = '1D'
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! * RS : Wigner-Seitz radius (in units of a_0)
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!
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! Output variables :
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!
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! * ENE_P_SI : plasmon energy in J
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!
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!
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! Author : D. Sébilleau
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!
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! Last modified : 17 Nov 2020
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!
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!
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USE ACCURACY_REAL
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USE REAL_NUMBERS, ONLY : HALF
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USE CONSTANTS_P1, ONLY : H_BAR,M_E,E,EPS_0
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USE FERMI_SI, ONLY : KF_SI
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USE PI_ETC, ONLY : PI_INV
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USE UTILITIES_1, ONLY : RS_TO_N0
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!
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IMPLICIT NONE
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!
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CHARACTER (LEN = 2) :: DMN
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!
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REAL (WP) :: RS
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REAL (WP) :: ENE_P_SI
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REAL (WP) :: COEF,N0
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!
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REAL (WP) :: SQRT
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!
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COEF = E * E / (M_E * EPS_0) !
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!
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N0 = RS_TO_N0(DMN,RS) !
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!
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IF(DMN == '3D') THEN !
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!
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!.......... 3D case ..........
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!
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ENE_P_SI = H_BAR * SQRT(COEF * N0) !
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!
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ELSE IF(DMN == '2D') THEN !
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!
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!.......... 2D case ..........
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!
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ENE_P_SI = H_BAR * SQRT(HALF * COEF * N0) ! * sqrt(q)
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!
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ELSE IF(DMN == '1D') THEN !
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!
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!.......... 1D case ..........
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!
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ENE_P_SI = H_BAR * SQRT(HALF * HALF * COEF * PI_INV * N0) ! * q * sqrt(Vc)
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!
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END IF !
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!
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END SUBROUTINE PLASMON_ENERGY
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!
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END MODULE PLASMON_ENE
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!
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!=======================================================================
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!
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MODULE PLASMA_SCALE
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!
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USE ACCURACY_REAL
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!
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CONTAINS
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!
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!
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!=======================================================================
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!
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SUBROUTINE CALC_PLASMA_SCALE
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!
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USE MATERIAL_PROP, ONLY : RS
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USE EXT_FIELDS, ONLY : T
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USE PLASMA, ONLY : ZION
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!
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USE PLASMON_SCALE_P
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!
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IMPLICIT NONE
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!
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CALL PLASMON_SCALE(RS,T,ZION,NONID,DEGEN) !
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!
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END SUBROUTINE CALC_PLASMA_SCALE
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!
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!=======================================================================
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!
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SUBROUTINE PLASMON_SCALE(RS,T,ZION,NONID,DEGEN)
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!
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! This subroutine calculates the plasmon scale parameters
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!
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! Input parameters:
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!
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! * RS : Wigner-Seitz radius (in units of a_0)
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! * T : temperature in SI
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! * ZION : atomic number of the ions of the plasma
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!
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! Output variables :
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!
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! * NONID : nonideality of plasmon --> dimensionless
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! * DEGEN : plasmon degeneracy
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!
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!
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! Author : D. Sébilleau
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!
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! Last modified : 25 Sep 2020
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!
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!
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!
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USE CONSTANTS_P1, ONLY : BOHR,E,EPS_0,K_B
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USE FERMI_SI, ONLY : EF_SI
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!
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IMPLICIT NONE
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!
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REAL (WP), INTENT(IN) :: RS,T,ZION
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REAL (WP), INTENT(OUT) :: NONID,DEGEN
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!
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NONID = EF_SI / (K_B * T) !
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DEGEN = ZION * ZION * E * E / (EPS_0 * K_B * T * RS * BOHR) !
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!
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END SUBROUTINE PLASMON_SCALE
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!
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END MODULE PLASMA_SCALE
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