Phys. Rev. B 77, 224303 (2008) [7 pages]Lattice dynamics of beryllium oxide: Inelastic x-ray scattering and ab initio calculationsReceived 15 April 2008; published 12 June 2008 The phonon-dispersion relations of the lightest wurtzite structure compound BeO have been determined from inelastic x-ray scattering (IXS) measurements and analyzed by ab initio calculations. Experimental data and calculations show good agreement and reconcile the existing controversies. The phonon linewidth of the longitudinal-optical phonon along Γ-A reveals a marked q dependence, which can be correlated with the two-phonon density of states, thus pointing toward a strong anharmonic behavior. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.77.224303
DOI:
10.1103/PhysRevB.77.224303
PACS:
63.20.D−, 61.05.cf, 71.15.Mb, 62.20.D−
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