The effect of non topological short range disorder in the density of states of germanium

Abstract

We study the effect of non topological short range disorder in the density of states n( E) of germanium. The method used approximates it by the average of local densities of states of systems with a few disordered sites surrounded by an ordered, crystalline structure. Changes in bond lengths and bond angles compatible with the radial distribution function of amorphous Ge and keeping the topology of diamond give densities of states very similar to that of crystalline Ge and not to the amorphous material. We thus conclude that non topological disorder alone does not explain the n( E) of amorphous Ge.