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

被引：1

作者：

Kuleev, I. G. ^{[1
]}

Kuleev, I. I. ^{[1
]}

Arapova, I. Yu. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Met Phys, Ural Div, Ekaterinburg 620219, Russia

来源：

PHYSICS OF THE SOLID STATE | 2008年 / 50卷 / 03期

关键词：

D O I：

10.1134/S1063783408030189

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

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：5