Spin transfer and coherence in coupled quantum wells

被引：31

作者：

Poggio, M ^{[1
]}

Steeves, GM ^{[1
]}

Myers, RC ^{[1
]}

Stern, NP ^{[1
]}

Gossard, AC ^{[1
]}

Awschalom, DD ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Ctr Spintron & Quantum Computat, Santa Barbara, CA 93106 USA

来源：

PHYSICAL REVIEW B | 2004年 / 70卷 / 12期

关键词：

D O I：

10.1103/PhysRevB.70.121305

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Spin dynamics of optically excited electrons confined in asymmetric coupled quantum wells are investigated through time-resolved Faraday rotation experiments. The interwell coupling is shown to depend on applied electric field and barrier thickness. We observe three coupling regimes: independent spin precession in isolated quantum wells, incoherent spin transfer between single-well states, and coherent spin transfer in a highly coupled system. Relative values of the interwell tunneling time, the electron-spin lifetime, and the Larmor precession period appear to govern this behavior.

引用

页码：121305 / 1

页数：4

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