Relaxation kinetics of quasi two-dimensional excitons coupled to a bath of bulk acoustic phonons

被引：10
作者：
Stenius, P
Ivanov, AL
机构：
[1] Univ Frankfurt, Inst Theoret Phys, D-60054 Frankfurt, Germany
[2] Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA
来源：
SOLID STATE COMMUNICATIONS | 1998年 / 108卷 / 02期
关键词：
quantum wells; electron-phonon interactions; thermodynamic properties;
D O I：
10.1016/S0038-1098(98)00278-6
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Thermalization of a low-density exciton gas in a quantum well in the presence of thermal bulk LA-phonons is studied within a Boltzmann kinetic equation. We find that as the lattice temperature is reduced below k(B)T = E-0 = 2M(x)c(s)(2) (M-x is the exciton mass and c(s) is the LA-phonon velocity) the time required for the excitons to reach thermal equilibrium starts to increase exponentially. The results of numerical modeling of the thermalization kinetics are reproduced by an analytic theory developed within the thermodynamic picture. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：117 / 122
页数：6
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