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Title: Intrinsic second-order anomalous hall effect and its application in compensated antiferromagnets
Authors: Liu, Huiying
Zhao, Jianzhou
Huang, Yue-Xin
Wu, Weikang
Sheng, Xian-Lei
Xiao, Cong
Yang, Shengyuan A.
Keywords: Science::Physics
Issue Date: 2021
Source: Liu, H., Zhao, J., Huang, Y., Wu, W., Sheng, X., Xiao, C. & Yang, S. A. (2021). Intrinsic second-order anomalous hall effect and its application in compensated antiferromagnets. Physical Review Letters, 127(27), 277202-.
Project: MOE2019-T2-1-001
Journal: Physical Review Letters
Abstract: Response properties that are purely intrinsic to physical systems are of paramount importance in physics research, as they probe fundamental properties of band structures and allow quantitative calculation and comparison with experiment. For anomalous Hall transport in magnets, an intrinsic effect can appear at the second order to the applied electric field. We show that this intrinsic second-order anomalous Hall effect is associated with an intrinsic band geometric property-the dipole moment of Berry-connection polarizability (BCP) in momentum space. The effect has scaling relation and symmetry constraints that are distinct from the previously studied extrinsic contributions. Particularly, in antiferromagnets with PT symmetry, the intrinsic effect dominates. Combined with first-principles calculations, we demonstrate the first quantitative evaluation of the effect in the antiferromagnet Mn_{2}Au. We show that the BCP dipole and the resulting intrinsic second-order conductivity are pronounced around band near degeneracies. Importantly, the intrinsic response exhibits sensitive dependence on the Néel vector orientation with a 2π periodicity, which offers a new route for electric detection of the magnetic order in PT-invariant antiferromagnets.
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.127.277202
Schools: School of Physical and Mathematical Sciences 
Rights: © 2021 American Physical Society. All rights reserved. This paper was published in Physical Review Letters and is made available with permission of American Physical Society.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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