Quantum metric nonlinear Hall effect in a topological antiferromagnetic heterostructure
成果类型：
Article
署名作者：
Gao, Anyuan; Liu, Yu-Fei; Qiu, Jian-Xiang; Ghosh, Barun; Trevisan, Thais V.; Onishi, Yugo; Hu, Chaowei; Qian, Tiema; Tien, Hung-Ju; Chen, Shao-Wen; Huang, Mengqi; Berube, Damien; Li, Houchen; Tzschaschel, Christian; Dinh, Thao; Sun, Zhe; Ho, Sheng-Chin; Lien, Shang-Wei; Singh, Bahadur; Watanabe, Kenji; Taniguchi, Takashi; Bell, David C.; Lin, Hsin; Chang, Tay-Rong; Du, Chunhui Rita; Bansil, Arun; Fu, Liang; Ni, Ni; Orth, Peter P.; Ma, Qiong; Xu, Su-Yang
署名单位：
Harvard University; Harvard University; Northeastern University; Iowa State University; United States Department of Energy (DOE); Ames National Laboratory; Massachusetts Institute of Technology (MIT); University of California System; University of California Los Angeles; National Cheng Kung University; University of California System; University of California San Diego; Boston College; Tata Institute of Fundamental Research (TIFR); National Institute for Materials Science; Harvard University; Harvard University; Academia Sinica - Taiwan; Canadian Institute for Advanced Research (CIFAR)
刊物名称：
SCIENCE
ISSN/ISSBN：
0036-11063
DOI：
10.1126/science.adf1506
发表日期：
2023-07-14
页码：
181-186
关键词：
摘要：
Quantum geometry in condensed-matter physics has two components: the real part quantum metric and the imaginary part Berry curvature. Whereas the effects of Berry curvature have been observed through phenomena such as the quantum Hall effect in two-dimensional electron gases and the anomalous Hall effect (AHE) in ferromagnets, the quantum metric has rarely been explored. Here, we report a nonlinear Hall effect induced by the quantum metric dipole by interfacing even-layered MnBi2Te4 with black phosphorus. The quantum metric nonlinear Hall effect switches direction upon reversing the antiferromagnetic (AFM) spins and exhibits distinct scaling that is independent of the scattering time. Our results open the door to discovering quantum metric responses predicted theoretically and pave the way for applications that bridge nonlinear electronics with AFM spintronics.