Extrinsic-intrinsic crossover of the spin Hall effect induced by alloying
Extrinsic-intrinsic crossover of the spin Hall effect induced by alloying
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DOI：
10.1103/physrevmaterials.3.054411
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发表时间：
2019-05-28
影响因子：
3.4
通讯作者：
Ando, Kazuya
中科院分区：
文献类型：
--
作者：
Musha, Akira;Kanno, Yusuke;Ando, Kazuya
我们观察到合金化引起的本征和非本征自旋霍尔效应之间的交叉。我们发现，自旋霍尔角，自旋霍尔电导率的电导率的比率，通过调整的Au-Cu合金的成分，急剧变化。由于非本征斜散射，自旋霍尔角仅在有限的Cu浓度范围内改变符号，而随着Cu浓度的增加，本征贡献变得占主导地位。这一观测结果为基本理解自旋轨道物理学提供了重要信息。
We report the observation of the crossover between the extrinsic and intrinsic spin Hall effect induced by alloying. We found that the spin Hall angle, the ratio of the spin Hall conductivity to the electric conductivity, changes drastically by tuning the composition of the Au-Cu alloy. The spin Hall angle changes sign only in a limited range of the Cu concentration due to the extrinsic skew scattering, while the intrinsic contribution becomes dominant with increasing Cu concentration. This observation provides essential information for a fundamental understanding of spin-orbit physics.