倾斜 Weyl 节点非线性光学电流的对称变换及其在铁磁 MnBi2Te4 中的应用

IF 1.5 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Chinese Physics B Pub Date : 2024-04-01 DOI:10.1088/1674-1056/ad2bfb

Zhuo-Cheng Lu, Ji Feng

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引用次数: 0

摘要

Weyl 节点以其手性和倾斜度为特征。我们提出了 nth 阶非线性光导率在各向异性张量和倾斜度变换下的行为理论，阐明了在倾斜度和手性反转的情况下，光导率中与手性相关和与手性无关的部分是如何变换的。在这一理论的基础上，我们提出将铁磁性 MnBi2Te4 作为磁电调节的太赫兹光学器件，通过磁电切换手性相关和手性无关的直流光电流。这些结果有助于在拓扑韦尔半金属的基础上创建非线性光学器件。

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Symmetry transformation of nonlinear optical current of tilted Weyl nodes and application to ferromagnetic MnBi2Te4

A Weyl node is characterized by its chirality and tilt. We develop a theory of how nth-order nonlinear optical conductivity behaves under transformations of anisotropic tensor and tilt, which clarifies how chirality-dependent and -independent parts of optical conductivity transform under the reversal of tilt and chirality. Built on this theory, we propose ferromagnetic MnBi₂Te₄ as a magnetoelectrically regulated, terahertz optical device, by magnetoelectrically switching the chirality-dependent and -independent DC photocurrents. These results are useful for creating nonlinear optical devices based on the topological Weyl semimetals.

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来源期刊

Chinese Physics B 物理-物理：综合

CiteScore

2.80

自引率

23.50%

发文量

15667

审稿时长

2.4 months

期刊介绍： Chinese Physics B is an international journal covering the latest developments and achievements in all branches of physics worldwide (with the exception of nuclear physics and physics of elementary particles and fields, which is covered by Chinese Physics C). It publishes original research papers and rapid communications reflecting creative and innovative achievements across the field of physics, as well as review articles covering important accomplishments in the frontiers of physics. Subject coverage includes: Condensed matter physics and the physics of materials Atomic, molecular and optical physics Statistical, nonlinear and soft matter physics Plasma physics Interdisciplinary physics.