Localization versus band crossing transitions in a multiband model of spatially disordered materials

摘要

A theory is developed to describe the electronic densities of states and localization characteristics of a multiband tighthyphen;binding model for a system characterized by quenched liquidhyphen;like disorder. For the case of ansp3system, and with parameters appropriate to fluid mercury at an independent electron level of description, the role of localization is found to be important: localized Fermihyphen;level states persist up to densities considerably higher than that at which thesndash;pband gap closes.