Rayleigh surface wave interaction with the 2D exciton Bose-Einstein condensate

被引：5
作者：
Boev, M. V. [1 ]
Kovalev, V. M.
机构：
[1] Russian Acad Sci, Inst Semicond Phys, Siberian Branch, Novosibirsk 630090, Russia
来源：
JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS | 2015年 / 120卷 / 06期
基金：
俄罗斯基础研究基金会;
关键词：
ACOUSTIC-WAVES;
D O I：
10.1134/S1063776115060047
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We describe the interaction of a Rayleigh surface acoustic wave (SAW) traveling on the semiconductor substrate with the excitonic gas in a double quantum well located on the substrate surface. We study the SAW attenuation and its velocity renormalization due to the coupling to excitons. Both the deformation potential and piezoelectric mechanisms of the SAW-exciton interaction are considered. We focus on the frequency and excitonic density dependences of the SAW absorption coefficient and velocity renormalization at temperatures both above and well below the critical temperature of Bose-Einstein condensation of the excitonic gas. We demonstrate that the SAW attenuation and velocity renormalization are strongly different below and above the critical temperature.
引用
收藏
页码：998 / 1004
页数：7
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