Photovoltaic chiral magnetic effect in Weyl semimetals
Photovoltaic chiral magnetic effect in Weyl semimetals
复制标题
DOI：
10.1103/physrevb.93.201202
复制
发表时间：
2016-01
影响因子：
3.7
通讯作者：
K. Taguchi;Tatsushi Imaeda;M. Sato;Yukio Tanaka
中科院分区：
文献类型：
--
作者：
K. Taguchi;Tatsushi Imaeda;M. Sato;Yukio Tanaka
我们从理论上预测了一代的电流外尔半金属应用圆偏振光。光的电场可以驱动10特斯拉量级的有效磁场。对于较低频率的光，在费米面附近形成非平衡自旋分布。由于自旋-动量锁定，感应出与有效磁场成正比的巨大电流。另一方面，更高频率的光实现了没有感应电流的准静态Floquet状态。我们讨论了有关材料和估计的数量级的感应电流。
We theoretically predict a generation of a current in Weyl semimetals by applying circularly polarized light. The electric field of the light can drive an effective magnetic field of order of ten Tesla. For lower frequency light, a non-equilibrium spin distribution is formed near the Fermi surface. Due to the spin-momentum locking, a giant electric current proportional to the effective magnetic field is induced. On the other hand, higher frequency light realizes a quasi-static Floquet state with no induced electric current. We discuss relevant materials and estimate order of magnitude of the induced current.