$negfsurfaceroughness

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

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