$negfsurfaceroughness

$negfsurfaceroughness is the command to setup the related parameters of surface roughness scattering.
The equation of surface roughness scattering:

$W_{sr}(k)=\frac{2\pi}{\hbar}\{\frac{2U_{0}I_{if}f(\Delta)\sin[(k_{i}-k_{f})]\frac{\lambda}{2}}{k_{i}-k_{f}}\}^{2}\frac{N_{1D}(E_{k})}{\sigma}$

Example:

$negfsurfaceroughness
$\lambda$ $U_{0}$

$negfsurfaceroughness
2.0e-9 7.328e-19
#colength  U0

related commands:

 $ifsolvenegf,  $negfifscattering,  $negfoverlapcalculation