Open Access
Open access
Science, volume 381, issue 6654, pages 181-186

Quantum metric nonlinear Hall effect in a topological antiferromagnetic heterostructure

Anyuan Gao 1
Yu-Fei Liu 1, 2
Jian Xiang Qiu 1
Barun Ghosh 3
Thaís V. Trevisan 4, 5
Yugo Onishi 6
Chao-Wei Hu 7
Tiema Qian 7
Hung-Ju Tien 8
Shao Wen Chen 2
Mengqi Huang 9
Damien Bérubé 1
Houchen Li 1
Thao Dinh 1, 2
Zhe Sun 1, 10
Sheng Chin Ho 1
Shang-Wei Lien 8
Bahadur Singh 11
Toshio TAMGUCHI 12
D. C. Bell 13, 14
Hsin-Chung Lin 15
Tay-Rong Chang 8, 16, 17
Chunhui Du 9
A. Bansil 3
Liang Fu 6
Ni Ni 7
Peter P. Orth 4, 5
QIONG MA 10, 18
Su Xu 1
Show full list: 31 authors
15
 
Institute of Physics, Academia Sinica, Taipei 11529, Taiwan.
16
 
Center for Quantum Frontiers of Research and Technology (QFort), Tainan 701, Taiwan.
17
 
Physics Division National Center for Theoretical Sciences, Taipei 10617, Taiwan.
Publication typeJournal Article
Publication date2023-07-14
Journal: Science
scimago Q1
wos Q1
SJR11.902
CiteScore61.1
Impact factor44.7
ISSN00368075, 10959203
Multidisciplinary
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.

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