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
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.
(Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)
引用本文:
. [J]. 中国物理快报, 2022, 39(7): 77101-.
Xin Gao, Jian Sun, Xiangang Wan, and Gang Li. Competition of Quantum Anomalous Hall States and Charge Density Wave in a Correlated Topological Model. Chin. Phys. Lett., 2022, 39(7): 77101-.
2022, Vol. 39 
