Competition of Quantum Anomalous Hall States and Charge Density Wave in a Correlated Topological Model  

作　　者：Xin Gao Jian Sun Xiangang Wan Gang Li 高鑫;孙健;万贤纲;李刚(School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China;National Laboratory of Solid State Microstructures and School of Physics,Nanjing University,Nanjing 210093,China;Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China;ShanghaiTech Laboratory for Topological Physics,ShanghaiTech University,Shanghai 201210,China)

机构地区：[1]School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China [2]National Laboratory of Solid State Microstructures and School of Physics,Nanjing University,Nanjing 210093,China [3]Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China [4]ShanghaiTech Laboratory for Topological Physics,ShanghaiTech University,Shanghai 201210,China

出　　处：《Chinese Physics Letters》2022年第7期63-68,共6页中国物理快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 11874263);the National Key R&D Program of China (Grant No. 2017YFE0131300);Shanghai Technology Innovation Action Plan (2020-Integrated Circuit Technology Support Program 20DZ1100605,2021-Fundamental Research Area 21JC1404700)。

摘　　要：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 noninteracting 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.

关 键 词：QUANTUM Competition of Quantum Anomalous Hall States and Charge Density Wave in a Correlated Topological Model 

分 类 号：O469[理学—凝聚态物理]