Giant Spin Hall Effect Induced by Skew Scattering from Bismuth Impurities inside Thin Film CuBi Alloys
Giant Spin Hall Effect Induced by Skew Scattering from Bismuth Impurities inside Thin Film CuBi Alloys
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DOI：
10.1103/physrevlett.109.156602
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发表时间：
2012-10-09
影响因子：
8.6
通讯作者：
Otani, Y.
中科院分区：
文献类型：
--
作者：
Niimi, Y.;Kawanishi, Y.;Otani, Y.
我们证明了一个巨大的自旋霍尔效应（SHE）可以通过引入少量的Bi杂质在铜诱导。基于一种新的三维自旋输运有限元方法的分析表明，Bi杂质引起的SHE符号为负，其自旋霍尔角为-0.24。CuBi合金中的这种负的大SH角可以通过应用由Fert和Levy [Phys. Rev. Lett. 106，157208（2011）]至6p杂质。
We demonstrate that a giant spin Hall effect (SHE) can be induced by introducing a small amount of Bi impurities in Cu. Our analysis, based on a new three-dimensional finite element treatment of spin transport, shows that the sign of the SHE induced by the Bi impurities is negative and its spin Hall (SH) angle amounts to -0.24. Such a negative large SH angle in CuBi alloys can be explained by applying the resonant scattering model proposed by Fert and Levy [Phys. Rev. Lett. 106, 157208 (2011)] to 6p impurities.