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arXiv 0809.3209cond-mat.mes-hall
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用于微结构中电子自旋输运时间分辨研究的紧凑型低温克尔显微镜

Compact cryogenic Kerr microscope for time-resolved studies of electron spin transport in microstructures

P. J. Rizo, A. Pugžlys, J. Liu, D. Reuter, A. D. Wieck, C. H. van der Wal, P. H. M. van Loosdrecht

摘要:

本文介绍了一种可在小体积高场磁体中工作的小型低温克尔显微镜。它适用于Voigt和Faraday配置的测量。该显微镜与脉冲激光源耦合,用于测量半导体微结构的时间分辨克尔旋转响应,空间分辨率约为1微米。该显微镜被设计用于研究自旋输运,这是自旋电子学领域的一个关键问题。因此,可以在微结构上的给定位置处产生自旋极化,并在不同位置处对其进行探测。的显微镜的操作演示的GaAs/AlGaAs异质结量子阱在4.2 K和7特斯拉的自旋极化电子的微米距离扩散的时间分辨测量。

英文摘要:

A compact cryogenic Kerr microscope for operation in the small volume of high-field magnets is described. It is suited for measurements both in Voigt and Faraday configuration. Coupled with a pulsed laser source, the microscope is used to measure the time-resolved Kerr rotation response of semiconductor microstructures with ~1 micron spatial resolution. The microscope was designed to study spin transport, a critical issue in the field of spintronics. It is thus possible to generate spin polarization at a given location on a microstructure and probe it at a different location. The operation of the microscope is demonstrated by time-resolved measurements of micrometer distance diffusion of spin polarized electrons in a GaAs/AlGaAs heterojunction quantum well at 4.2 K and 7 Tesla.

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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