| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Quantum Anomalous Hall Effects Controlled by Chiral Domain Walls |
| Qirui Cui1,2, Jinghua Liang2, Yingmei Zhu2, Xiong Yao2, and Hongxin Yang1,2* |
1National Laboratory of Solid State Microstructures, School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
2Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
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| Cite this article: |
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Qirui Cui, Jinghua Liang, Yingmei Zhu et al 2023 Chin. Phys. Lett. 40 037502 |
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Abstract We report the interplay between two different topological phases in condensed matter physics, the magnetic chiral domain wall (DW), and the quantum anomalous Hall (QAH) effect. It is shown that the chiral DW driven by Dzyaloshinskii–Moriya interaction can divide the uniform domain into several zones where the neighboring zone possesses opposite quantized Hall conductance. The separated domain with a chiral edge state (CES) can be continuously modified by external magnetic field-induced domain expansion and thermal fluctuation, which gives rise to the reconfigurable QAH effect. More interestingly, we show that the position of CES can be tuned by spin current driven chiral DW motion. Several two-dimensional magnets with high Curie temperature and large topological band gaps are proposed for realizing these phenomena. The present work thus reveals the possibility of chiral DW controllable QAH effects.
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Received: 17 December 2022
Editors' Suggestion
Published: 24 February 2023
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| PACS: |
75.60.Ch
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(Domain walls and domain structure)
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73.20.Mf
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(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
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75.30.Et
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(Exchange and superexchange interactions)
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