Extrinsic anomalous Hall effect in charge and heat transport in pure iron, Fe0.997Si0.003, and Fe0.97Co0.03
Extrinsic anomalous Hall effect in charge and heat transport in pure iron, Fe0.997Si0.003, and Fe0.97Co0.03
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DOI：
10.1103/physrevb.79.100404
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发表时间：
2009-03-01
影响因子：
3.7
通讯作者：
Tokura, Y.
中科院分区：
文献类型：
--
作者：
Shiomi, Y.;Onose, Y.;Tokura, Y.
我们研究了名义纯铁和掺杂杂质铁的热霍尔电导率和电霍尔电导率，以研究在低温清洁极限条件下斜散射诱导的异常霍尔效应。在Fe、Fe0.997Si0.003和Fe0.97Co0.03中，我们观察到在100 K以下电和热霍尔导率的急剧变化。反常霍尔分量（L-xy(A)）的洛伦兹数的突变，甚至包括信号相反的电荷流和热流的符号变化，也在霍尔电导率的交叉温度周围观察到。这些观测结果表明，在100 K以下存在由斜散射引起的耗散异常霍尔电流。
We have investigated thermal and electrical Hall conductivities for nominally pure and impurity-doped iron to examine the skew-scattering-induced anomalous Hall effect in the low-temperature clean-limit regime. In Fe, Fe0.997Si0.003, and Fe0.97Co0.03, we have observed the steep change in the electrical and thermal Hall conductivities below 100 K. The abrupt change in the Lorenz numbers for the anomalous Hall component (L-xy(A)) that includes even the sign change signaling the opposite flow of charge and heat currents is also observed around the crossover temperature of Hall conductivity. These observations indicate the emergence of the dissipative anomalous Hall current induced by the skew scattering below 100 K.