Vibrational Properties of Hexagonal Boron Nitride: Inelastic X-Ray Scattering and<i>Ab Initio</i>Calculations

Abstract

The phonon dispersion relations of bulk hexagonal boron nitride have been determined from inelastic x-ray scattering measurements and analyzed by ab initio calculations. Experimental data and calculations show an outstanding agreement and reconcile the controversies raised by recent experimental data obtained by electron-energy loss spectroscopy and second-order Raman scattering.