Intrinsic and Extrinsic Anomalous Hall Effects in Disordered Magnetic Weyl Semimetal
Intrinsic and Extrinsic Anomalous Hall Effects in Disordered Magnetic Weyl Semimetal
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DOI：
10.7566/jpsj.91.013703
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发表时间：
2021-10
影响因子：
1.7
通讯作者：
Koji Kobayashi;K. Nomura
中科院分区：
文献类型：
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作者：
Koji Kobayashi;K. Nomura
我们对无序磁性韦尔半金属的内在和外在霍尔效应进行了数值研究。我们证明，在费米能量偏离外尔点的外尔金属中，霍尔和纵向电导表现出特定的关系，这与整数量子霍尔系统中众所周知的关系不同。在韦尔点附近，霍尔电导随着纵向电导的增加而增加。这种增加的行为表明，除了体贝里曲率之外，外尔锥体的子带对霍尔电导还存在额外的贡献。我们还表明，由于自旋散射体（偏斜散射）引起的外在异常霍尔效应在韦尔金属中被显着抑制。
We study the intrinsic and extrinsic Hall effects in disordered magnetic Weyl semimetals numerically. We show that in Weyl metals, where the Fermi energy deviates from the Weyl point, the Hall and longitudinal conductances exhibit a specific relation, which is distinguished from the well-known relation in integer quantum Hall systems. Around the Weyl point, the Hall conductance increases with increasing longitudinal conductance. This increasing behavior indicates the existence of additional contributions to the Hall conductance from the subbands of Weyl cones besides that from the bulk Berry curvature. We also show that the extrinsic anomalous Hall effect due to the spin scatterers (skew scattering) is significantly suppressed in Weyl metals.