Interstitial potential differences, electronegativity differences, and effective ionic charges in zinc-blende-type semiconductors

Simple semi‐empirical self‐consistent pseudopotential calculations of various semiconductors, fitted to the empirical band structures, lead to interstital potential differences that can be described by an ionic model such that the ionic charges are proportional to the differences of the PHillips electronegativities for the participating ion species, e*/e≃0.76DX. The results are applied to dipole corrections in heterojunction lineups.