An EPM calculation of band structure of zincblende semiconductor alloys

Abstract

The band structures of several zincblende semiconductor alloys are calculated in the virtual crystal approximation using the empirical pseudopotential method (EPM). The authors propose an interpolation scheme for the pseudopotential form factors that applies universally well to various zincblende semiconductor alloys. The calculated results are in good agreement with experiments, where the lattice mismatch is large. For the case of small lattice mismatch, it appears necessary to include the disorder effect.