论文标题
量化磁场的Weyl和多翼半准中的非线性磁导率
Nonlinear magnetoconductivity in Weyl and multi-Weyl semimetal in quantizing magnetic field
论文作者
论文摘要
Magnetotransport和Magneto-Optics实验为研究材料的物理特性提供了非常有力的探针。在这里，我们研究了倾斜的I型Weyl和多翼半角的二阶非线性磁磁性。与线性响应方案中的手性异常相反，我们表明Weyl Semimetal不会在非线性转运方案中携带手性电荷泵送。我们预测，反转对称性损坏和倾斜的Weyl半准可以支持有限的纵向非线性磁导频，否则在Weyl半准中不存在。非线性磁导率在超量子极限下消失，中间磁场状态振荡，并在半经典极限下饱和。非线性磁导率依赖于倾斜方向，可用于通过非线性磁路线或第二次谐波生成实验来确定Weyl和Multi-Weyl半法的倾斜方向。
Magnetotransport and magneto-optics experiments offer a very powerful probe for studying the physical properties of materials. Here, we investigate the second-order nonlinear magnetoconductivity of tilted type-I Weyl and multi-Weyl semimetal. In contrast to the presence of chiral anomaly in the linear response regime, we show that Weyl semimetal do not host chiral charge pumping in the nonlinear transport regime. We predict that an inversion symmetry broken and tilted Weyl semimetal can support finite longitudinal nonlinear magnetoconductivity, which is otherwise absent in untilted Weyl semimetal. The nonlinear magnetoconductivity vanishes in the ultra-quantum limit, oscillates in the intermediate magnetic field regime and saturates in the semiclassical limit. The nonlinear magnetoconductivity depends intricately on the tilt orientation, and it can be used to determine the tilt orientation in Weyl and multi-Weyl semimetals, via nonlinear magnetoresistivity or second harmonic generation experiments.
