Screening of exciton states by quasi-two-dimensional electron gas in quantum wells

被引：11
|
作者：
Kulakovskii, DV [1 ]
Gubarev, SI
Lozovik, YE
机构：
[1] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Moscow Region, Russia
[2] Russian Acad Sci, Inst Spect, Troitsk 142092, Moscow Region, Russia
来源：
JETP LETTERS | 2001年 / 74卷 / 02期
基金：
俄罗斯基础研究基金会;
关键词：
71.35.Cc; 73.21.Fg;
D O I：
10.1134/1.1405899
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Changes in the binding energy and oscillator strength of an exciton state due to screening by a quasi-two-dimensional electron gas were calculated self-consistently in a nonlinear approximation. It was shown that the collapse of the bound state proceeds at very small concentrations N-s similar or equal to 5 x 10(9) cm(-2), which is a consequence of taking into account the nonlinearity of the system response to the Coulomb perturbation. (C) 2001 MAIK "Nauka/Interperiodica".
引用
收藏
页码：118 / 121
页数：4
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