Berry连接和曲率
物理
霍尔效应
凝聚态物理
几何相位
量子霍尔效应
曲率
哈密顿量(控制论)
量子力学
磁场
几何学
数学
数学优化
作者
Cheng-Ping Zhang,Xue-Jian Gao,Ying-Ming Xie,Hoi Chun Po,K. T. Law
出处
期刊:Physical review
日期:2023-03-21
卷期号:107 (11)
被引量:30
标识
DOI:10.1103/physrevb.107.115142
摘要
In recent years, it has been shown that Berry curvature monopoles and dipoles play essential roles in the anomalous Hall and the nonlinear Hall effects, respectively. In this work, we demonstrate that Berry curvature multipoles (the higher moments of Berry curvatures at the Fermi energy) can induce higher-order nonlinear anomalous Hall (NLAH) effects. Specifically, an AC Hall voltage perpendicular to the current direction emerges, where the frequency is an integer multiple of the frequency of the applied current. Importantly, by analyzing the symmetry properties of all the 3D and 2D magnetic point groups, we note that the quadrupole, hexapole, and even higher Berry curvature moments can cause the leading-order frequency multiplication in certain materials. To provide concrete examples, we point out that the third-order NLAH voltage can be the leading-order Hall response in certain antiferromagnets due to Berry curvature quadrupoles, and the fourth-order NLAH voltage can be the leading response in the surface states of topological insulators induced by Berry curvature hexapoles. Our results are established by symmetry analysis, effective Hamiltonian, and first-principles calculations. Other materials which support the higher-order NLAH effect are further proposed, including 2D antiferromagnets and ferromagnets, Weyl semimetals, and twisted bilayer graphene near the quantum anomalous Hall phase.
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