Impurity-induced vector spin chirality and anomalous Hall effect in ferromagnetic metals
Impurity-induced vector spin chirality and anomalous Hall effect in ferromagnetic metals
复制标题
DOI：
10.1088/1367-2630/aaf510
复制
发表时间：
2018-06
影响因子：
3.3
通讯作者：
H. Ishizuka;N. Nagaosa
中科院分区：
文献类型：
--
作者：
H. Ishizuka;N. Nagaosa
多个散射体的散射有时会引起异常的霍尔效应。本文研究了非磁性杂质与局域磁矩的关联引起的反常霍尔效应的一种机制，即矢量自旋手征引起的霍尔效应。利用散射理论方法，研究了由两个磁矩和一个非磁性杂质的散射过程引起的斜散射，该散射过程与非磁性杂质附近自旋的矢量旋手性成正比.此外，我们表明，一个有限的矢量自旋手征自然存在于周围的杂质在通常的铁磁金属在有限的温度下，由于局部反转对称性破缺的杂质。这一结果可能与磁性氧化物在有限温度下反常霍尔效应增强有关。
Scattering by multiple scatterers sometimes gives rise to nontrivial consequences such as anomalous Hall effect. We here study a mechanism for anomalous Hall effect which originates from the correlation of non-magnetic impurities and localized moments; a Hall effect induced by vector spin chirality. Using a scattering theory approach, we study the skew scattering induced by the scattering processes that involve two magnetic moments and a non-magnetic impurity, which is proportional to the vector spin chirality of the spins in the vicinity of the non-magnetic impurity. Furthermore, we show that a finite vector spin chirality naturally exists around an impurity in the usual ferromagnetic metals at finite temperature due to the local inversion-symmetry breaking by the impurity. The result is potentially relevant to magnetic oxides which the anomalous Hall effect is enhanced at finite temperatures.