Quantum metric nonlinear Hall effect in a topological antiferromagnetic heterostructure
Abstract
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 MnBi 2 Te 4 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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 14, 2023
- Source ID
- 10.1126/science.adf1506
Entities
People
- Anyuan Gao
- Arun Bansil
- Bahadur Singh
- Barun Ghosh
- Chaowei Hu
- Christian Tzschaschel
- Chunhui Du
- D C Bell
- Damien Bérubé
- Houchen Li
- Hsin Lin
- Hung-Ju Tien
- Jian-Xiang Qiu
- Kenji Watanabe
- Liang Fu
- Mengqi Huang
- Ni Ni
- Peter P Orth
- Qiong Ma
- Shang-wei Lien
- Shaowen Chen
- Sheng-chin Ho
- Su-Yang Xu
- Takashi Taniguchi
- Tay-Rong Chang
- Thao Dinh
- Thaís V. Trevisan
- Tiema Qian
- Yu-fei Liu
- Yugo Onishi
- Zhe Sun
Organizations
- Academia Sinica
- Ames National Laboratory
- Boston College
- Canadian Institute for Advanced Research
- Harvard University
- Iowa State University
- Massachusetts Institute of Technology
- National Center for theoretical Sciences
- National Cheng Kung University
- National Institute for Materials Science
- Northeastern University
- Tata Institute of Fundamental Research
- University of California, Los Angeles
- University of California, San Diego