Influences of temperature and polaron effect on the ground state of quasi-two-dimensional strong-coupling exciton

被引：0
|
作者：
Eerdunchaolu [1 ]
机构：
[1] Hebei Normal Univ Sci & Technol, Dept Math & Phys, Qinhuangdao 066004, Hebei, Peoples R China
来源：
ACTA PHYSICA SINICA | 2008年 / 57卷 / 01期
关键词：
quantum well; strong-coupling exciton; polaron effect; temperature dependence;
D O I：
10.7498/aps.57.416
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The influences of temperature and polaron effect on the ground state of the system, for which the exciton is strongly coupled with interface-optical (IO) phonons but weakly coupled with bulk-longitudinal-optical (LO) phonons in a quantum well, are studied by using the Huybrechts' linear-combination operator and Lee-Low-Pines (LLP) transformation method. The expressions for the induced potential and energy shift of the ground state of the exciton were derived. Numerical calculations for AgCl/AgBr QW, as an example, are performed. The result indicates that the induced potential and the energy shift increases for strong exciton-IO-phonon coupling but decreases for weak exciton-LO-phonon coupling with temperature.
引用
收藏
页码：416 / 424
页数：9
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