The lattice dynamics of indium pnictides

Abstract

The ten-parameter overlap valence shell model is used to explain the lattice dynamics of InP and InSb, and two preliminary models are proposed for InAs. It is shown that the interatomic forces in the indium compounds can be related to those of the gallium pnictides (GaP, GaAs and GaSb). A systematic variation of the (dominant) nearest neighbour central force parameter with lattice spacing is found for the gallium and indium pnictides as well as for the zinc chalcogenides.