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Title: Nonreciprocal transport in a bilayer of MnBi₂Te₄ and Pt
Authors: Ye, Chen
Xie, Xiangnan
Lv, Wenxing
Huang, Ke
Yang, Allen Jian
Jiang, Sicong
Liu, Xue
Zhu, Dapeng
Qiu, Xuepeng
Tong, Mingyu
Zhou, Tong
Hsu, Chuang-Han
Chang, Guoqing
Lin, Hsin
Li, Peisen
Yang, Kesong
Wang, Zhenyu
Jiang, Tian
Wang, Renshaw Xiao
Keywords: Science::Physics
Issue Date: 2022
Source: Ye, C., Xie, X., Lv, W., Huang, K., Yang, A. J., Jiang, S., Liu, X., Zhu, D., Qiu, X., Tong, M., Zhou, T., Hsu, C., Chang, G., Lin, H., Li, P., Yang, K., Wang, Z., Jiang, T. & Wang, R. X. (2022). Nonreciprocal transport in a bilayer of MnBi₂Te₄ and Pt. Nano Letters, 22(3), 1366-1373.
Project: MOE-T2EP50120-0006
Journal: Nano Letters 
Abstract: MnBi2Te4 (MBT) is the first intrinsic magnetic topological insulator with the interaction of spin-momentum locked surface electrons and intrinsic magnetism, and it exhibits novel magnetic and topological phenomena. Recent studies suggested that the interaction of electrons and magnetism can be affected by the Mn-doped Bi2Te3 phase at the surface due to inevitable structural defects. Here, we report an observation of nonreciprocal transport, that is, current-direction-dependent resistance, in a bilayer composed of antiferromagnetic MBT and nonmagnetic Pt. The emergence of the nonreciprocal response below the Néel temperature confirms a correlation between nonreciprocity and intrinsic magnetism in the surface state of MBT. The angular dependence of the nonreciprocal transport indicates that nonreciprocal response originates from the asymmetry scattering of electrons at the surface of MBT mediated by magnon. Our work provides an insight into nonreciprocity arising from the correlation between magnetism and Dirac surface electrons in intrinsic magnetic topological insulators.
ISSN: 1530-6984
DOI: 10.1021/acs.nanolett.1c04756
Rights: © 2022 American Chemical Society. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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