Transverse Effective Charges of A^NB^8-N Compounds with Zincblende Structure

Abstract

The transverse effective charge Z_T of A^NB ^8-Ncompounds is expressed as a function of the Phillips ionicity. Thechemical trend of Z_T for zincblende A^NB ^8-N compounds iscalculated on the basis of a lattice-distortion model where atoms areassumed to be slightly displaced. The calculated Z_T is comparedwith the experimental Z_T for III-V, II-VI, and I-VII compounds. Itis found that the theoretical Z_T well reproduces the observedchemical trend of Z_T for these compounds.