Pressure-Induced Phonon Frequency Shifts Measured by Raman Scattering

Abstract

Pressure shifts of long-wavelength LO and TO phonons of a number of diamond-, zinc-blende-, and wurtzite-type crystals as functions of hydrostatic pressure have been investigated by Raman-scattering measurements. The measured Gr\"uneisen parameters appear to correlate with ionicity. The ${E}_{2}$ modes of CdS and ZnO have also been studied.