Inverse spin Hall effect driven by spin motive force.
Inverse spin Hall effect driven by spin motive force.
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DOI：
10.1103/physrevlett.102.086603
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发表时间：
2008-10
影响因子：
8.6
通讯作者：
J. Shibata;H. Kohno
中科院分区：
文献类型：
--
作者：
J. Shibata;H. Kohno
自旋霍尔效应是电场感应自旋霍尔电流的现象。本文研究了在铁磁导体中，由磁化织构随时间变化而产生的自旋动力或自旋相关的有效“电场”E_{s}所引起的电荷霍尔电流的逆效应。通过考虑杂质的自旋轨道相互作用引起的斜散射和侧跳过程，我们得到了霍尔电流密度σ_{SH}n × E_{s}，其中n是局域自旋方向，σ_{SH}是自旋霍尔电导率。与由于普通电场引起的常规异常霍尔效应相比，由于自旋原动力引起的霍尔角增强了P-2倍，其中P是电流的自旋极化。霍尔电压估计的场驱动的畴壁振荡的铁磁纳米线。
The spin Hall effect is a phenomenon in which an electric field induces a spin Hall current. In this Letter, we examine the inverse effect that, in a ferromagnetic conductor, a charge Hall current is induced by a spin motive force, or a spin-dependent effective "electric" field E_{s}, arising from the time variation of magnetization texture. By considering skew-scattering and side-jump processes due to spin-orbit interaction at impurities, we obtain the Hall current density as sigma_{SH}n x E_{s}, where n is the local spin direction and sigma_{SH} is the spin Hall conductivity. The Hall angle due to the spin motive force is enhanced by a factor of P-2 compared to the conventional anomalous Hall effect due to the ordinary electric field, where P is the spin polarization of the current. The Hall voltage is estimated for a field-driven domain-wall oscillation in a ferromagnetic nanowire.