Effective Charges of AgI and CuX (<b><i>X</i>=<i>C</i><i>l</i></b>, Br, I)

Abstract

Effective charges of superionic conductors are calculated by using a microscopic dielectric function which is composed of valence electron and localized d electron terms. The d electron terms of the effective charge are evaluated by using the tight-binding approximation. It is found that the d electrons enhance the transverse effective charge.