| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Competition of Quantum Anomalous Hall States and Charge Density Wave in a Correlated Topological Model |
| Xin Gao1, Jian Sun1, Xiangang Wan2,3, and Gang Li1,4* |
1School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
2National Laboratory of Solid State Microstructures and School of Physics, Nanjing University, Nanjing 210093, China
3Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
4ShanghaiTech Laboratory for Topological Physics, ShanghaiTech University, Shanghai 201210, China
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| Cite this article: |
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Xin Gao, Jian Sun, Xiangang Wan et al 2022 Chin. Phys. Lett. 39 077101 |
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Abstract We investigate the topological phase transition driven by non-local electronic correlations in a realistic quantum anomalous Hall model consisting of $d_{xy}$–$d_{x^{2}-y^{2}}$ orbitals. Three topologically distinct phases defined in the non-interacting limit evolve to different charge density wave phases under correlations. Two conspicuous conclusions were obtained: The topological phase transition does not involve gap-closing and the dynamical fluctuations significantly suppress the charge order favored by the next nearest neighbor interaction. Our study sheds light on the stability of topological phase under electronic correlations, and we demonstrate a positive role played by dynamical fluctuations that is distinct to all previous studies on correlated topological states.
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Received: 12 April 2022
Published: 22 June 2022
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| PACS: |
71.70.Ej
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(Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)
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