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Surface acoustic wave velocity and elastic constants of cubic GaN

Riobóo, R. J. J., R. Cuscó, C. Prieto, C. Kopittke, S. V. Novikov, and L. Artús (2016), Surface acoustic wave velocity and elastic constants of cubic GaN, Applied Physics Express, 9(6), doi: 10.7567/APEX.9.061001.

Abstract

We present high-resolution surface Brillouin scattering measurements on cubic GaN layers grown on GaAs substrate. By using a suitable scattering geometry, scattering by surface acoustic waves is recorded for different azimuthal angles, and the surface acoustic wave velocities are determined. A comparison of experimental results with numerical simulations of the azimuthal dependence of the surface wave velocity shows good agreement and allows a consistent set of elastic constants for c-GaN to be determined.

Reference paper

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