论文标题
对Weyl材料中伪电场的电和手性反应
Electric and chiral response to a pseudoelectric field in Weyl materials
论文作者
论文摘要
研究了对时间和坐标依赖性的伪电场$ \ mathbf {e} _5 $中的电流和手性电流响应。发现$ \ Mathbf {e} _5 $导致沿垂直于场的方向和磁场诱导扰动的波向量的电流。我们将这种现象称为异常的伪壁效应。还发现手性或山谷电流对伪电场的反应是非平凡的。由于不能忽略$ \ mathbf {e} _5 $的波矢量，因此手性电导率的频率曲线与显示出类似阶梯的特征而不是光滑的drude峰的电动元素截然不同。提出的效果可以通过驱动声波驱动声波中的weyl半度值，其时间反向对称性断裂。
The electric and chiral current response to the time- and coordinate-dependent pseudoelectric field $\mathbf{E}_5$ in Weyl semimetals is studied. It is found that $\mathbf{E}_5$ leads to an electric current in the direction perpendicular to the field and the wave vector of the field-inducing perturbation. We dubbed this phenomenon the anomalous pseudo-Hall effect. The response of the chiral or valley current to the pseudoelectric field is also found to be nontrivial. Since the wave vector for $\mathbf{E}_5$ cannot be neglected, the frequency profile of the chiral conductivity is drastically different from its electric counterpart showing a step-like feature instead of a smooth Drude peak. The proposed effects can be investigated by driving sound waves in Weyl semimetals with broken time-reversal symmetry.
