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arXiv 1409.8540cond-mat.mes-hall
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利用横向自旋阀研究Cu/Bi界面的逆Rashba-Edelstein效应

Origin of inverse Rashba-Edelstein effect at Cu/Bi interface using lateral spin valves

M. Isasa, M. C. Martínez-Velarte, E. Villamor, C. Magén, L. Morellón, J. M. De Teresa, M. R. Ibarra, G. Vignale, E. V. Chulkov, E. E. Krasovskii, L. E. Hueso, F. Casanova

摘要:

利用坡莫合金/铜/铋(Py/Cu/Bi)横向自旋阀结构研究了铋的自旋输运和自旋-电荷电流转换特性。自旋电流在Bi的表面被强烈吸收,导致超短的自旋扩散长度。测量了自旋-电荷电流转换,这归因于Cu/Bi界面处的逆Rashba-Edelstein效应。发现自旋电流诱导的电荷电流随着温度的升高而改变方向。理论分析将这种行为与费米能处的复杂自旋结构和表面态的色散联系起来。对这种现象的理解开辟了新的可能性,利用自旋-轨道耦合来创建,操纵和检测2D系统中的自旋电流。

英文摘要:

The spin transport and spin-to-charge current conversion properties of bismuth are investigated using permalloy/copper/bismuth (Py/Cu/Bi)lateral spin valve structures. The spin current is strongly absorbed at the surface of Bi, leading to ultra-short spin diffusion lengths. A spin-to-charge current conversion is measured, which is attributed to the inverse Rashba-Edelstein effect at the Cu/Bi interface. The spin-current-induced charge current is found to change direction with increasing temperature. A theoretical analysis relates this behavior to the complex spin structure and dispersion of the surface states at the Fermi energy. The understanding of this phenomenon opens novel possibilities to exploit spin-orbit coupling to create, manipulate, and detect spin currents in 2D 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。

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