Wirtz, Ludger[Institut d'électronique de microélectronique et de nanotechnologie = Institute for Electronics, Microelectronics, and Nanotechnology - IEMN > ISEN]
[en] 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.