Phonon signature of the high‐pressure rocksalt phase of InN

Abstract

AbstractPhonon dispersion and phonon density of states of the high‐pressure rocksalt phase of InN are calculated ab initio, at different pressures, using the density functional perturbation theory. Born effective charge , LDA values of dielectric constant and of the electronic gap are obtained as well. Building on the theoretical knowledge of phonon frequencies and their evolution with pressure, we attempt to interpret the set of six bands found previously in Raman spectra of epitaxial layers and of InN‐nanowires.