Anomalous spin dephasing in (110) GaAs quantum wells:: Anisotropy and intersubband effects -: art. no. 147405

被引：145
|
作者：
Döhrmann, S
Hägele, D
Rudolph, J
Bichler, M
Schuh, D
Oestreich, M
机构：
[1] Univ Hannover, Inst Festkorperphys, D-30167 Hannover, Germany
[2] Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany
来源：
PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 14期
关键词：
D O I：
10.1103/PhysRevLett.93.147405
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A strong anisotropy of electron spin decoherence is observed in GaAs/(AlGa)As quantum wells grown on a (110) oriented substrate. The spin lifetime of spins perpendicular to the growth direction is about one order of magnitude shorter compared to spins along [110]. The spin lifetimes of both spin orientations decrease monotonically above temperatures of 80 and 120 K, respectively. The decrease is very surprising for spins along the [110] direction and cannot be explained by the usual Dyakonov-Perel dephasing mechanism. A novel spin dephasing mechanism is put forward that is based on scattering of electrons between different quantum well subbands.
引用
收藏
页码：147405 / 1
页数：4
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