标题： 轴向规范场在非中心对称磁性外尔半金属中的当前响应 显示英文标题

标题： Current response to axial gauge fields in noncentrosymmetric magnetic Weyl semimetals

摘要： 我们研究非中心对称磁性外尔半金属中对轴向规范场的电流响应。时间反演和倒置对称性的同时缺失允许出现新的响应类型。我们系统地计算了具有线性和二次色散关系的轴向规范势的横向、纵向和霍尔响应。横向和霍尔响应的量级相当，而纵向响应要小得多。值得注意的是，随着频率的增加，横向和霍尔响应函数表现出一个峰值，其高度由外尔费米子的性质决定，与轴向规范势无关。在存在杂质的情况下，响应函数的主要特征仍然存在。作为我们结果的应用，我们提出了一种霍尔型磁压电效应，其中横向声波可以产生一个方向垂直于声波传播方向和极化方向的电流。我们的结果还提供了一种使用电场激发磁振子的机制，可能对磁振子自旋电子学有用。 显示英文摘要

摘要： We investigate the electric current response to axial gauge fields in noncentrosymmetric magnetic Weyl semimetals. The absence of both time-reversal and inversion symmetries allows for new types of responses. We systematically calculate the transverse, longitudinal, and Hall responses to axial gauge potentials with both linear and quadratic dispersion relations. The transverse and Hall responses are of comparable magnitude, while the longitudinal response is much smaller. Notably, with increasing frequency, the transverse and Hall response functions manifest a peak whose height is determined by the properties of Weyl fermions and is independent of the axial gauge potential. The main features of the response functions survive in the presence of disorders. As applications of our results, we propose a Hall type magnetopiezoelectric effect, where a transverse sound wave can induce an electric current whose direction is perpendicular to the directions of sound propagation and polarization. Our results also provide a mechanism to excite magnons using electric fields and could be useful for magnon spintronics.