Generation of Sound by a Two-Dimensional Gas of Indirect Dipolar Excitons

被引：2
|
作者：
Boev, M. V. [1 ]
Kovalev, V. M. [1 ,2 ]
Chaplik, A. V. [1 ,3 ]
机构：
[1] Russian Acad Sci, Rzhanov Inst Semicond Phys, Siberian Branch, Pr Akad Lavrenteva 13, Novosibirsk 630090, Russia
[2] Novosibirsk State Tech Univ, Novosibirsk 630073, Russia
[3] Novosibirsk State Univ, Novosibirsk 630090, Russia
来源：
JETP LETTERS | 2015年 / 102卷 / 12期
基金：
俄罗斯基础研究基金会;
关键词：
Transverse Wave; Acoustic Wave; JETP Letter; Polarization Operator; Exciton Interaction;
D O I：
10.1134/S0021364015240030
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The generation of acoustic waves by a gas of two-dimensional indirect dipolar excitons irradiated by an electromagnetic wave has been studied by the deformation potential method. It has been shown that an acoustic wave propagating into the interior of the isotropic substrate is generally a superposition of longitudinal and transverse waves. At high frequencies of electromagnetic perturbation, the generated acoustic wave degenerates almost completely into a transverse wave. The amplitudes of both waves have been calculated. Their frequency dependences at temperatures above and below the temperature of condensation of the exciton gas have been determined.
引用
收藏
页码：807 / 810
页数：4
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