Berry连接和曲率
物理
耗散系统
量子
非线性系统
量子力学
曲率
点反射
T对称
极化率
横截面
凝聚态物理
数学
分子
超导电性
结构工程
几何学
工程类
作者
Kamal Das,Shibalik Lahiri,Rhonald Burgos Atencia,Dimitrie Culcer,Amit Agarwal
出处
期刊:Physical review
日期:2023-11-30
卷期号:108 (20)
标识
DOI:10.1103/physrevb.108.l201405
摘要
Three mechanisms are known to contribute to second-order nonlinear current: Extrinsic nonlinear Drude, Berry curvature dipole, and intrinsic Berry connection polarizability. Here, we predict an intrinsic contribution to the current related to the quantum metric, a quantum geometric property of the electronic wave function. This contribution manifests in systems that simultaneously break the time-reversal and the inversion symmetry. Interestingly, this contribution is dissipative and contributes to both longitudinal and transverse response. The quantum metric-induced NL current dominates transport in parity-time reversal symmetric systems near the band edges, something we show explicitly for topological antiferromagnets.
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