Dynamics in magneto-optical propreties of digital magnetic Zn1-xCdxSe quantum wells

被引：0
作者：
Nakayama, E [1 ]
Kayanuma, K [1 ]
Tomita, T [1 ]
Murayama, A [1 ]
Chen, ZH [1 ]
Oka, Y [1 ]
机构：
[1] Tohoku Univ, IMRAM, Aoba Ku, Sendai, Miyagi 9808577, Japan
来源：
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2004年 / 21卷 / 2-4期
关键词：
diluted magnetic semiconductor; quantum well; digital doping; exciton magnetic polaron;
D O I：
10.1016/j.physe.2003.11.164
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We have studied dynamics in magneto-optical properties of digital magnetic Zn1-xCdxSe quantum wells (QWs). Various types of MnSe layers were digitally doped in the Zn1-xCdxSe QWs. The giant Zeeman shift energy and the field-induced enhancement of the photoluminescence (PL) intensity of excitons depend on the digital-doping profile. This can be attributed to the spatial overlap of the exciton wavefunction with the 0.5 monatomic-thick effective paramagnetic layers at the interfaces between the antiferromagnetic MnSe layers and non-magnetic Zn1-xCdxSe layers. The exciton magnetic polaron (MP) formation energy as large as 18.6 meV is observed in time-resolved PL spectra for the digital magnetic QWs. The MP formation energy and: time are also affected by the digital-doping profile. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：1027 / 1031
页数：5
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