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arXiv 1005.3559cond-mat.mes-hall
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二维电子气中自旋相关电导率的测量

Measurement of spin-dependent conductivities in a two-dimensional electron gas

H. Ebrahimnejad, Y. Ren, S. M. Frolov, I. Adagideli, J. A. Folk, W. Wegscheider

摘要:

在面内磁场作用下,通过向GaAs二维电子气通道注入非极化电荷流,产生自旋积累,然后在非局域几何中进行测量。与以前使用自旋极化纳米结构的测量不同,这里的自旋累积仅仅是由于自旋向上和自旋向下载流子的体电导率差异引起的。比较扩散模型,包括自旋子带分裂在磁场表明一个显着增强的电子自旋磁化率在二维电子气。

英文摘要:

Spin accumulation is generated by injecting an unpolarized charge current into a channel of GaAs two-dimensional electron gas subject to an in-plane magnetic field, then measured in a non-local geometry. Unlike previous measurements that have used spin-polarized nanostructures, here the spin accumulation arises simply from the difference in bulk conductivities for spin-up and spin-down carriers. Comparison to a diffusive model that includes spin subband splitting in magnetic field suggests a significantly enhanced electron spin susceptibility in the 2D electron gas.

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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