Excitonic spin states and radiative recombinations in Cd1-xMnxTe/Cd1-yMgyTe spin superlattices

被引：10
作者：
Debnath, MC
Shen, JX
Souma, I
Sato, T
Pittini, R
Chen, ZH
Oka, Y
机构：
[1] Tohoku Univ, Res Inst Sci Measurements, Sendai, Miyagi 9808577, Japan
[2] Japan Sci & Technol Corp, CREST, Kawaguchi 3320012, Japan
[3] E Tek Dynam, San Jose, CA 95131 USA
来源：
PHYSICA E | 2001年 / 10卷 / 1-3期
关键词：
spin superlattice; Zeeman splitting; exciton magnetic polaron;
D O I：
10.1016/S1386-9477(01)00106-0
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The formation of a spin superlattice structure was realized in Cd0.95Mn0.05Te/Cd0.95Mg0.05Te under a magnetic field. The experimental evidence of the spin superlattice structure was found from time-resolved polarized magneto-photoluminescence measurements, in the Zeeman splittings and the exciton magnetic polaron formation. The Zeeman splitting directly indicates the spatial separation of spin-up and spin-down electrons and heavy holes, which are localized in the Cd0.95Mg0.05Te and Cd0.95Mn0.05Te layers, respectively. The formation of exciton magnetic polarons under a magnetic field can he attributed to the spin-dependent confinement where a large polaron binding energy of 3.5 meV has been observed in 2.5 T to be enhanced by the field-induced localization of the excitons. (C) 2001 Published by Elsevier Science B.V.
引用
收藏
页码：310 / 314
页数：5
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