SPIN DYNAMICS AND DIMENSIONALITY IN DILUTED MAGNETIC SEMICONDUCTORS

被引:5
作者
AWSCHALOM, DD
FREEMAN, MR
机构
[1] IBM T.J. Watson Research Center, Yorktown Heights
来源
PHYSICA B | 1991年 / 169卷 / 1-4期
关键词
D O I
10.1016/0921-4526(91)90241-6
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
A parallel set of two low-temperature optical experiments are performed to explore the connection between magnetic and electronic properties in Cd1-xMn(x)Te diluted magnetic semiconductor quantum structures. Using a combination of integrated DC SQUIDs and ultrafast optical techniques, dynamical measurements reveal the magnetic manifestations of carrier scattering and localization in quantum wells. These magnetic spectroscopy studies show entirely different time scales for magnetic interactions as compared to electronic spin behavior, and are seen to persist long after the carriers have disappeared from the system. In addition, femtosecond spin-polarized luminescence experiments record unexpectedly rapid electronic spin scattering of charge carriers (< 150 fs) with a dramatic dependence of these times on the dimensionality.
引用
收藏
页码:285 / 292
页数:8
相关论文
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