Elastic waves and the Landau-Rumer mechanism of relaxation of quasi-transverse phonons in GaAs crystals

被引：0

作者：

I. G. Kuleev

I. I. Kuleev

I. Yu. Arapova

机构：

[1] Russian Academy of Sciences,Institute of Metal Physics, Ural Division

来源：

Physics of the Solid State | 2008年 / 50卷

关键词：

62.20.Dc; 62.80.+f; 63.20.-e; 63.20.Kr;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The dependences of the relaxation rate and the absorption coefficient of ultrasound in GaAs crystals on the direction of the wave vector of quasi-transverse phonons for the Landau-Rumer mechanism are analyzed in the framework of the anisotropic-continuum model. The calculations are performed with two sets of second-order and third-order elastic moduli experimentally measured by different authors. It is demonstrated that the angular dependences of the relaxation rates of quasi-transverse phonons and the ultrasonic absorption coefficients calculated from these data differ qualitatively. The correctness of the determination of the third-order elastic moduli available in the literature can be checked by measuring the ultrasonic absorption coefficients for GaAs crystals.

引用

页码：502 / 506

页数：4

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