Numerical Study of Localization in Disordered Systems with p-like Atomic States

Numerical studies are made on the localization of p -electrons in disordered two dimensional lattices with fluctuations in the interatomic distance not larger than those found in a liquid. Results based on simple models for the interaction between atomic p -states indicate that the localizability of p -electrons is not so enhanced as compared to that of s -electrons. Further, a system is considered in which an atom has both s - and p -states. It is demonstrated that the s p -hybridization considerably enhances the localizability at the extremities of a band.