Journal
PHYSICAL REVIEW B
Volume 77, Issue 22, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.77.224303
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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 Gamma-A reveals a marked q dependence, which can be correlated with the two-phonon density of states, thus pointing toward a strong anharmonic behavior.
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