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arXiv 0704.3928cond-mat.mtrl-scicond-mat.other
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寄生电子效应下硅的自旋寿命

Spin lifetime in silicon in the presence of parasitic electronic effects

Biqin Huang, Douwe J. Monsma, Ian Appelbaum

摘要:

一种混合铁磁体/半导体器件用于确定硅中传导电子自旋寿命的下限。我们使用自旋旋进来自洽地测量自旋极化电子的漂移速度与漂移场,并使用这种电子控制来改变电子注入和检测之间的渡越时间。作为漂移速度的函数的归一化磁流的测量与一个简单的指数衰减模型一起使用,以论证所获得的寿命(~2 ns)被电子效应人为地降低,并且可能高出几个数量级。

英文摘要:

A hybrid ferromagnet/semiconductor device is used to determine a lower bound on the spin lifetime for conduction electrons in silicon. We use spin precession to self-consistently measure the drift velocity vs. drift field of spin-polarized electrons and use this electronic control to change the transit time between electron injection and detection. A measurement of normalized magnetocurrent as a function of drift velocity is used with a simple exponential-decay model to argue that the lifetime obtained (~2 ns) is artificially lowered by electronic effects and is likely orders of magnitude higher.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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