Kagome materials serve as crucial platforms for investigating the quantum anomalous Hall effect (QAHE) due to the presence of kagome bands in their electronic structures. However, despite the theoretical predictions being proposed, kagome band material realizations have been limited. In this work, through tight-binding (TB) model analysis, by setting the nearest-neighbor hopping integrals with opposite signs, we propose a Yin–Yang kagome band structure characterized by two stable enantiomorphic kagome bands. Furthermore, we design a monolayer V3Cl6 to confirm the TB model. Three V atoms are located in different coordination environments in V3Cl6, so opposite signs of the hopping integrals between two of their orthogonal d orbitals can be achieved, which is the key to realize Yin–Yang kagome band structures. The calculated band structures obtained from first principles are consistent with those from the TB model. Additionally, we find that the two enantiomorphic flat bands in monolayer V3Cl6 possess opposite Chern number after spin–orbit coupling is considered, which can also be confirmed from symmetry index analysis. The Chern numbers as well as the topological properties can be modulated by doping hole or adjusting the magnetization directions, so the QAHE can be tuned in monolayer V3Cl6. Our results provide a practicable pathway for realizing Yin–Yang kagome band structures and achieving tunable QAHE in them.
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22 July 2024
Research Article|
July 23 2024
Realization of Yin–Yang kagome bands and tunable quantum anomalous Hall effect in monolayer V3Cl6
Special Collection:
Topological and Chiral Matter – Physics and Applications
Fanzheng Chen
;
Fanzheng Chen
(Writing – original draft)
1
School of Physics and Electronics, Shandong Normal University
, Jinan 250358, China
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Jiajun Lu
;
Jiajun Lu
(Software)
1
School of Physics and Electronics, Shandong Normal University
, Jinan 250358, China
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Xiuwen Zhao
;
Xiuwen Zhao
(Supervision)
1
School of Physics and Electronics, Shandong Normal University
, Jinan 250358, China
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Guichao Hu
;
Guichao Hu
(Supervision)
1
School of Physics and Electronics, Shandong Normal University
, Jinan 250358, China
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Xiaobo Yuan
;
Xiaobo Yuan
(Supervision)
1
School of Physics and Electronics, Shandong Normal University
, Jinan 250358, China
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Junfeng Ren
Junfeng Ren
a)
(Writing – review & editing)
1
School of Physics and Electronics, Shandong Normal University
, Jinan 250358, China
2
Shandong Provincial Engineering and Technical Center of Light Manipulations and Institute of Materials and Clean Energy, Shandong Normal University
, Jinan 250358, China
a)Author to whom correspondence should be addressed: [email protected]
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a)Author to whom correspondence should be addressed: [email protected]
Appl. Phys. Lett. 125, 043103 (2024)
Article history
Received:
June 03 2024
Accepted:
July 13 2024
Citation
Fanzheng Chen, Jiajun Lu, Xiuwen Zhao, Guichao Hu, Xiaobo Yuan, Junfeng Ren; Realization of Yin–Yang kagome bands and tunable quantum anomalous Hall effect in monolayer V3Cl6. Appl. Phys. Lett. 22 July 2024; 125 (4): 043103. https://doi.org/10.1063/5.0221779
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