论文标题
Weyl半法中的三维量子厅效应和磁化特性
Three-dimensional quantum Hall effect and magnetothermoelectric properties in Weyl semimetals
论文作者
论文摘要
我们从数值上研究了在存在障碍存在下的三维（3D）量子霍尔效应（QHE）和Weyl半含量的磁化磁性转运。我们获得了一个批量的图片，即外来的3D QHE在Weyl点附近以有限的费米能量出现，这是由$ n = -1 $和$ n = 1 $ landau级别（LLS）之间的差距确定的。量化的霍尔电导率归因于横穿间隙的手性零体，并且在磁场方向沿中间数量的层差异散射具有稳健性。此外，我们预测了3D QHE制度中热电传输系数的几个有趣的特征，可以通过实验探测。这可能为探索拓扑材料中的Weyl物理学开辟了途径。
We numerically study the three-dimensional (3D) quantum Hall effect (QHE) and magnetothermoelectric transport of Weyl semimetals in the presence of disorder. We obtain a bulk picture that the exotic 3D QHE emerges in a finite range of Fermi energy near the Weyl points determined by the gap between the $n=-1$ and $n=1$ Landau levels (LLs). The quantized Hall conductivity is attributable to the chiral zeroth LLs traversing the gap, and is robust against disorder scattering for an intermediate number of layers in the direction of the magnetic field. Moreover, we predict several interesting characteristic features of the thermoelectric transport coefficients in the 3D QHE regime, which can be probed experimentally. This may open an avenue for exploring Weyl physics in topological materials.
