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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.


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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