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Photovoltaic chiral magnetic effect in Weyl semimetals

机译:Weyl半金属中的光伏手性磁效应

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摘要

We theoretically predict current generation in Weyl semimetals when circularly polarized light is applied. The electric field of the light can drive an effective magnetic field on the order of 10 T. For lower-frequency light, a nonequilibrium spin distribution is formed near the Fermi surface. Spin-momentum locking induces a giant electric current proportional to the effective magnetic field. In contrast, higher-frequency light realizes a quasistatic Floquet state with no induced electric current. We discuss the relevant materials and estimate the order of magnitude of the induced current.
机译:从理论上讲,当施加圆偏振光时,我们预测Weyl半金属中的电流产生。光的电场可以驱动大约10 T的有效磁场。对于低频光,在费米表面附近会形成非平衡自旋分布。自旋动量锁定会产生与有效磁场成比例的巨大电流。相反,高频光在没有感应电流的情况下实现了准静态浮球状态。我们讨论了相关材料,并估计了感应电流的数量级。

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  • 来源
    《Physical review》 |2016年第20期|201202.1-201202.5|共5页
  • 作者单位

    Department of Applied Physics, Nagoya University, Nagoya, 464-8603, Japan,CREST, Japan Science and Technology Corporation (JST), Nagoya 464-8603, Japan;

    Department of Applied Physics, Nagoya University, Nagoya, 464-8603, Japan,CREST, Japan Science and Technology Corporation (JST), Nagoya 464-8603, Japan;

    Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto, 606-8502, Japan,CREST, Japan Science and Technology Corporation (JST), Nagoya 464-8603, Japan;

    Department of Applied Physics, Nagoya University, Nagoya, 464-8603, Japan,CREST, Japan Science and Technology Corporation (JST), Nagoya 464-8603, Japan;

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