论文标题
均匀侵略磁铁中的手性光电流和拓扑抗fiferromagnet的响应增强
Chiral photocurrent in parity-violating magnet and enhanced response in topological antiferromagnet
论文作者
论文摘要
通过照射光（所谓的光电流）诱导的整流电流是光电物理学中已建立的现象。在本文中，我们介绍了由批量系统中的平等违规产生的光电流反应的全面分类。我们阐明了$ \ Mathcal {t} $ - 和$ \ Mathcal {pt} $ - 对称性的对比作用，因此找到了一种新型的光电现象，具有奇偶性磁铁的特征，固有的fermi表面效应和旋转电流。特别是，回旋电流是由圆形光的光引起的，它是由线性偏振光引起的移位电流的对应物。该光电流添加了在混凝土物理学（例如多效物和旋转型物理学）中研究的材料的新功能。提供了材料列表。此外，我们表明，拓扑上的非平凡带色散可强烈增强回旋电流。根据对狄拉克模型的微观分析，我们证明了发光的光电流响应并阐明了狄拉克锥的倾斜的重要性。
Rectified electric current induced by irradiating light, so-called photocurrent, is an established phenomenon in optoelectronic physics. In this paper, we present a comprehensive classification of the photocurrent response arising from the parity violation in bulk systems. We clarify the contrasting role of $\mathcal{T}$- and $\mathcal{PT}$-symmetries and consequently find a new type of photocurrent phenomena characteristic of parity-violating magnets, intrinsic Fermi surface effect and gyration current. Especially, the gyration current is induced by the circularly-polarized light and it is the counterpart of the shift current caused by the linearly-polarized light. This photocurrent adds a new functionality of materials studied in various fields of condensed matter physics such as multiferroics and spintronics. A list of materials is provided. Furthermore, we show that the gyration current is strongly enhanced by topologically nontrivial band dispersion. On the basis of the microscopic analysis of Dirac models, we demonstrate the divergent photocurrent response and elucidate the importance of tilting of Dirac cones.
