| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Magnus Hall Effect in Two-Dimensional Materials |
| Rui-Chun Xiao1,2,3, Zibo Wang4,5, Zhi-Qiang Zhang2, Junwei Liu6*, and Hua Jiang2,3* |
1Institute of Physical Science and Information Technology, Anhui University, Hefei 230601, China
2School of Physical Science and Technology, Soochow University, Suzhou 215006, China
3Institute for Advanced Study, Soochow University, Suzhou 215006, China
4College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610068, China
5Center for Computational Sciences, Sichuan Normal University, Chengdu 610068, China
6Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China
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| Cite this article: |
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Rui-Chun Xiao, Zibo Wang, Zhi-Qiang Zhang et al 2021 Chin. Phys. Lett. 38 057301 |
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Abstract The Magnus Hall effect (MHE) is a new type of linear-response Hall effect, recently proposed to appear in two-dimensional (2D) nonmagnetic systems at zero magnetic field in the ballistic limit. The MHE arises from a self-rotating Bloch electron moving under a gradient-electrostatic potential, analogous to the Magnus effect in the macrocosm. Unfortunately, the MHE is usually accompanied by a trivial transverse signal, which hinders its experimental observation. We systematically investigate the material realization and experimental measurement of the MHE, based on symmetry analysis and first-principles calculations. It is found that both the out-of-plane mirror and in-plane two-fold symmetries can neutralize the trivial transverse signal to generate clean MHE signals. We choose two representative 2D materials, monolayer MoS$_2$, and bilayer WTe$_2$, to study the quantitative dependency of MHE signals on the direction of the electric field. The results are qualitatively consistent with the symmetry analysis, and suggest that an observable MHE signal requires giant Berry curvatures. Our results provide detailed guidance for the future experimental exploration of MHE.
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Received: 11 January 2021
Published: 02 May 2021
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| PACS: |
72.10.-d
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(Theory of electronic transport; scattering mechanisms)
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68.65.-k
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(Low-dimensional, mesoscopic, nanoscale and other related systems: structure and nonelectronic properties)
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| Fund: Supported by the National Basic Research Program of China (Grant No. 2019YFA0308403), the National Natural Science Foundation of China (Grant Nos. 11822407, 11947212, 11704348, and NSFC20SC07), the China Postdoctoral Science Foundation (Grant No. 2018M640513), and the Hong Kong Research Grants Council (Grant Nos. 26302118, 16305019, and N_HKUST626/18). |
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