Simple qualitative rules to study the surface electronic structure of some binary crystals

Abstract

AbstractBased on the use of the important qualitative concept of energy‐weighted averages, a few simple rules are formulated that facilitate the analysis of the existence of surface states and enable the estimation of the effect of surface charge self‐consistency on the electronic structure of AB‐type crystal surfaces. Recent theoretical and experimental investigations of the (001) and (111) surfaces of refractory transition metal compounds TiC and TiN are discussed in detail. The problem of the stability of the polar (111) surface of TiC is mentioned.