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arXiv 1107.3121cond-mat.mes-hallcond-mat.dis-nncond-mat.mtrl-scicond-mat.other
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自旋电条纹:自旋电流引起的电压

Spin-electric stripes: Electric voltage induced by spin currents

Y. B. Lyanda-Geller

摘要:

在平行于电流的二维(2D)矩形导体的每个边界处,出现具有横向于电流的电场和100%电子自旋极化的条纹。这两个条纹具有相反的自旋取向和相反的电场方向。如果自旋弛豫可以忽略,则场的大小与自旋流直接相关,它们是相同的。外围条纹被中心条纹隔开,其中电场的大小和方向取决于斜散射和侧跳自旋电流的比率。自旋极化在中心线上为零,在中心和外围条纹之间的边界处达到+1或-1。垂直于2D平面的自旋的z分量的弱弛豫修改自旋极化和场的幅度,其中+1(-1)自旋极化在样品的边缘处持续。有利的实验设置,其中电子自旋弛豫的z-分量的自旋被抑制,但自旋电流不,进行了讨论。

英文摘要:

At each of the boundaries of the two-dimensional (2D) rectangular conductor parallel to the electric current there arises a stripe with an electric field transverse to the current and a 100% electron spin polarization. The two stripes have opposite spin orientations and opposite directions of electric fields. The magnitudes of the fields, directly related to the spin current if the spin relaxation is negligible, are the same. The periphery stripes are separated by a center-stripe, in which the magnitude and direction of the electric field depend on the ratio of the skew scattering and side jump spin currents. The spin polarization is zero on the center-line and reaches +1 or -1 at the boundaries between the central and periphery stripes. Weak relaxation of the z-component of spin normal to the 2D plane modifies the magnitudes of the spin polarization and fields, with +1 (-1) spin polarization persisting at the edges of the sample. Favorable experimental settings, in which the electron spin relaxation of the z-component of spin is suppressed but the spin current is not, are discussed.

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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