Indication of intrinsic spin Hall effect in 4d and 5d transition metals
Indication of intrinsic spin Hall effect in 4d and 5d transition metals
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DOI：
10.1103/physrevb.83.174405
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发表时间：
2011-05-02
影响因子：
3.7
通讯作者：
Otani, Y.
中科院分区：
文献类型：
--
作者：
Morota, M.;Niimi, Y.;Otani, Y.
我们研究了4d和5d过渡金属，Nb，Ta，Mo，Pd和Pt中的自旋霍尔效应，通过将自旋吸收方法结合在横向自旋阀结构中，其中大的自旋电流优选地弛豫到过渡金属中，表现出强的自旋-轨道相互作用。因此，非局域自旋阀测量使我们能够评估其自旋霍尔电导率。自旋霍尔电导率的符号根据d电子的数量而系统地变化。这一趋势与最近基于内禀自旋霍尔效应的理论计算相一致。
We have investigated spin Hall effects in 4d and 5d transition metals, Nb, Ta, Mo, Pd, and Pt, by incorporating the spin absorption method in the lateral spin valve structure, where large spin current preferably relaxes into the transition metals, exhibiting strong spin-orbit interactions. Thereby nonlocal spin valve measurements enable us to evaluate their spin Hall conductivities. The sign of the spin Hall conductivity changes systematically depending on the number of d electrons. This tendency is in good agreement with the recent theoretical calculation based on the intrinsic spin Hall effect.