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Surface acoustic waves and elastic constants of InN epilayers determined by Brillouin scattering

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Abstract

The surface acoustic wave velocity in InN has been experimentally determined by means of Brillouin scattering experiments on c - and m -face epilayers. From simulations based on the Green's function formalism we determine the shear elastic constants c66 and c44 and propose a complete set of elastic constants for wurtzite InN. The analysis of the sagittal and azimuthal dependence of the surface acoustic wave velocity indicates a slightly different elastic behavior of the m -face sample that basically affects the c44 elastic constant. (© 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

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