arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0801.4021cond-mat.mes-hall
收藏

二维电子气中纯自旋电流的电产生

Electrical generation of pure spin currents in a two-dimensional electron gas

S. M. Frolov, A. Venkatesan, W. Yu, W. Wegscheider, J. A. Folk

摘要:

在GaAs二维电子气(2DEG)的微米宽通道中测量了纯自旋电流。自旋注入和检测使用量子点接触,这成为自旋极化在高磁场。在非局部测量几何结构中实现了对自旋信号的高灵敏度,这大大减少了与电荷电流相关联的杂散信号。测得的自旋弛豫长度范围为30至50微米,比GaAs 2DEG中报道的长得多。这里开发的技术提供了一个灵活的工具,在介观结构中定义的2D半导体系统的自旋极化和自旋动力学的研究。

英文摘要:

Pure spin currents are measured in micron-wide channels of GaAs two-dimensional electron gas (2DEG). Spins are injected and detected using quantum point contacts, which become spin polarized at high magnetic field. High sensitivity to the spin signal is achieved in a nonlocal measurement geometry, which dramatically reduces spurious signals associated with charge currents. Measured spin relaxation lengths range from 30 to 50 microns, much longer than has been reported in GaAs 2DEG's. The technique developed here provides a flexible tool for the study of spin polarization and spin dynamics in mesoscopic structures defined in 2D semiconductor systems.

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。

↑