Exciton spin injection in CdTe/Cd1-xMnxTe double quantum wells

被引：0
|
作者：
Kayanuma, K
Debnath, AC
Souma, I
Chen, Z
Murayama, A
Kobayashi, M
Miyazaki, H
Oka, Y
机构：
[1] Tohoku Univ, IMRAM, Aoba Ku, Sendai, Miyagi 9808577, Japan
[2] Japan Sci & Technol Corp, CREST, Kawaguchi 3320012, Japan
[3] Tohoku Univ, Dept Appl Phys, Aoba Ku, Sendai, Miyagi 9808579, Japan
来源：
PHYSICA STATUS SOLIDI B-BASIC RESEARCH | 2002年 / 229卷 / 02期
关键词：
D O I：
10.1002/1521-3951(200201)229:2<761::AID-PSSB761>3.0.CO;2-F
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Spin injection processes of excitons were studied by time-resolved photoluminescence in double quantum wells consisting of Cd0.95Mn0.05Te and CdTe layers. Selective excitation of the magnetic and non-magnetic wells confirms the dominant spin injection process from the magnetic well to the non-magnetic well. The exciton spin injection from the magnetic quantum well of Cd0.95Mn0.05Te arises with an injection time of 10 ps and induces a transient spin polarization with the degree of 0.20 in the non-magnetic well of CdTe. The exciton spin relaxation time in the CdTe well was found to be sufficiently longer than the exciton lifetime of 38 ps.
引用
收藏
页码：761 / 764
页数：4
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