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

被引：0
作者：
M. V. Boev
V. M. Kovalev
机构：
[1] Russian Academy of Sciences,Institute of Semiconductor Physics, Siberian Branch
[2] Novosibirsk State Technical University,undefined
来源：
Journal of Experimental and Theoretical Physics | 2015年 / 120卷
关键词：
Rayleigh Wave; Surface Acoustic Wave; Deformation Potential; Exciton Density; Double Quantum Well;
D O I：
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中图分类号：
学科分类号：
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.
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页码：998 / 1004
页数：6
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