论文标题
手性光放大器，带泵的Weyl半法
Chiral light amplifier with pumped Weyl semimetals
论文作者
论文摘要
平行的电场和磁场应用于Weyl Semimetals通过轴向异常泵轴向电荷，直到通过Intervalley松弛平衡。所得的非平衡稳态表现出手性磁效应以及异常的大厅效应，与麦克斯韦的方程相结合，可导致低频和长波长的不稳定电磁波。在这里，我们表明，这种手性磁不稳定性表现为泵韦尔半分泵表面的异常反射率。根据电气，手性磁和异常的大厅电导率，发现反射率在有限的频率范围内超过统一，对于沿Weyl节点分离方向的圆形极化光入射。
Parallel electric and magnetic fields applied to Weyl semimetals pump axial charge via the axial anomaly until balanced by intervalley relaxation. The resulting nonequilibrium steady state exhibits the chiral magnetic effect as well as the anomalous Hall effect, which coupled with Maxwell's equations leads to unstable electromagnetic waves at low frequency and long wavelength. Here, we show that such chiral magnetic instability manifests itself as anomalous reflectance of the surface of pumped Weyl semimetal. Depending on electric, chiral magnetic, and anomalous Hall conductivities, the reflectance is found to exceed unity in a finite range of frequency for a circularly polarized light incident along the direction of Weyl node separation.
