Interband Contributions from the Magnetic Field on Hall Effects for Dirac Electrons in Bismuth
Interband Contributions from the Magnetic Field on Hall Effects for Dirac Electrons in Bismuth
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DOI：
10.1103/physrevlett.102.066601
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发表时间：
2009-02-13
影响因子：
8.6
通讯作者：
Fukuyama, Hidetoshi
中科院分区：
文献类型：
--
作者：
Fuseya, Yuki;Ogata, Masao;Fukuyama, Hidetoshi
研究了具有自旋-轨道相互作用的狄拉克电子的霍尔电导σ(Xy)。结果表明，磁场的带间效应对Sigma(Xy)有一种非常规的贡献，这种贡献在带边附近非常显著，与杂质的散射关系不大，这与已知的大抗磁性具有相同的起源。相应地，霍尔系数在带边附近出现了意想不到的峰值。讨论了本结果对铋合金的影响。
The Hall conductivity sigma(xy) of Dirac electrons with a spin-orbit interaction is examined. It is shown that there is an unconventional contribution to sigma(xy) generated by the interband effects of a magnetic field, which is remarkable near the band edges and does not depend on impurity scatterings so much, suggesting the same origin as the known large diamagnetism. Correspondingly, the Hall coefficient exhibits unexpected peaks at around the band edges. Implications of the present results to bismuth alloys are discussed.