EXCITON COOLING IN SHORT-PERIOD GAAS/ALGAAS SUPERLATTICES

被引：2
作者：
MARIE, X
AMAND, T
DAREYS, B
RAZDOBREEV, I
SHEKUN, Y
BARRAU, J
BRABANT, JC
机构：
[1] Laboratoire de Physique des Solides, associé au CNRS INSA, 31077 Toulouse Cedex, Avenue de Rangueil
来源：
SUPERLATTICES AND MICROSTRUCTURES | 1992年 / 12卷 / 01期
关键词：
D O I：
10.1016/0749-6036(92)90213-O
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
An experimental and theoretical study of the cooling of excitons in short period GaAs AlxGa1-xAs superlattices (SLs) is presented. The time resolved luminescence results show that the exciton cooling rate is higher in a superlattice than in 3D GaAs and depends on the periodicity of the SL. The experimental data can quantitatively be explained by a model which relies on a generalization of a 3D exciton cooling model, the SL being treated as a 3D anisotropic material. This model which takes into account the deformation potential and piezoelectric exciton-acoustic phonon interaction shows that the exciton energy loss rate increases when the SL miniband dispersion decreases. © 1992.
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页码：7 / 15
页数：9
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