Based on first-principles calculations, we predict a giant crystal-induced transverse current in antiferromagnetic γ-FeMn. This abnormal transverse current cannot be understood by the conventional anomalous Hall effect (e.g., Berry curvature, skew scattering, and side jump), which widely exists in ferromagnetic and antiferromagnetic materials. Moreover, the efficiency of the transverse current generation therein can be as large as 18.4% at low temperatures; this is an order of magnitude larger than the anomalous Hall angle in conventional ferromagnetic materials, such as Fe or Fe-based alloys. Furthermore, using the Boltzmann transport equation and a tight-binding model, we conclude that the asymmetric group velocities on the Fermi surface are the origin of this crystal-induced transverse current in γ-FeMn. Additionally, with a systematic discussion, we show that this unusual effect is not dependent on specific materials but is universal in any crystal with anisotropic symmetry.
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3 January 2022
Research Article|
January 03 2022
Crystal-induced transverse current in collinear antiferromagnetic γ-FeMn
Lei Wang
;
Lei Wang
a)
1
Center for Spintronics and Quantum Systems, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University
, 28 Xianning West Road Xi'an, Shaanxi 710049, China
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Ka Shen
;
Ka Shen
2
Center for Advanced Quantum Studies and Department of Physics, Beijing Normal University
, Beijing 100875, China
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Stepan S. Tsirkin;
Stepan S. Tsirkin
3
Department of Physics, University of Zurich
, Winterthurerstrasse 190, Zurich CH-8057, Switzerland
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Tai Min;
Tai Min
1
Center for Spintronics and Quantum Systems, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University
, 28 Xianning West Road Xi'an, Shaanxi 710049, China
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Appl. Phys. Lett. 120, 012403 (2022)
Article history
Received:
August 31 2021
Accepted:
December 15 2021
Citation
Lei Wang, Ka Shen, Stepan S. Tsirkin, Tai Min, Ke Xia; Crystal-induced transverse current in collinear antiferromagnetic γ-FeMn. Appl. Phys. Lett. 3 January 2022; 120 (1): 012403. https://doi.org/10.1063/5.0069504
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