Type material (material%eg ...)

Type(NODEMATERIAL) :: material is for saving each node's material variables. There are many material parameters saved in the Type "material"

 material%dope(i)   ! The doping density of node i   (unit cm^-3)
 material%ea(i)     ! The activation energy of node i  (unit:eV)
 material%Eg(i)     ! The node's bandgap (unit eV)
 material%impurity(i)    ! The node's impurity or fixed charge density 
 material%charges(i)     ! The addition node's fixed charge density. It is similar to impurity
 material%ep(i)     ! The node's dielectric connstant. The unit is cgs unit. So if the dielectric constant is $12 \epsilon_{0}$, you need to put $12\times 8.854\times 10^{-14}$
 material%polx(i)    ! The spontaneous and piezo-electric polarization value along x direction. 
 material%poly(i)    ! The spontaneous and piezo-electric polarization value along y direction. 
 material%polz(i)     ! The spontaneous and piezo-electric polarization value along z direction. The unit is ( $cm ^{-2}$ ). For example, if the polarization is $0.03 C/m^{2}$, you need to put $0.03\times 6.25\times 10^{14}$
 material%efmass(1,i)  ! Effective mass of electron in parallel direciton (x & y) (unit $m_{0}$)
 material%efmass(2,i)    ! effective mass of electron in perpendicular direction (z) (unit $m_{0}$)
 material%efmass(3,i)     ! effective mass of heavy hole  (unit $m_{0}$)
 material%efmass(4,i)   ! effective mass of light hole (unit $m_{0}$)
 material%trapNT(i)     ! Trap density  (unit $cm^{-2}$)
 material%trapEt(i)      ! Trap levels
 material%trapdegenercy(i)  ! Trap degenercy
 material%traptaun(i)   !  electron trap lifetime
 material%traptaup(i)    ! hole trap lifetime
 material%taun(i)     ! nonradiative lifetime of electrons
 material%taup(i)     ! nonradiative lifetime of holes