title: Anderson Localization from the Berry-Curvature Interchange in Quantum Anomalous Hall Systems.
abstract: We theoretically investigate the localization mechanism of the quantum anomalous Hall effect (QAHE) in the presence of spin-flip disorders. We show that the QAHE stays quantized at weak disorders, then enters a Berry-curvature mediated metallic phase at moderate disorders, and finally goes into the Anderson insulating phase at strong disorders. From the phase diagram, we find that at the charge neutrality point although the QAHE is most robust against disorders, the corresponding metallic phase is much easier to be localized into the Anderson insulating phase due to the interchange of Berry curvatures carried, respectively, by the conduction and valence bands. In the end, we provide a phenomenological picture related to the topological charges to better understand the underlying physical origin of the QAHE Anderson localization.
authors: ICQD, Hefei National Laboratory for Physical Sciences at Microscale, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.|CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.|Department of Physics, The University of Texas at Austin, Austin, Texas 78712, USA.
authors: Zhenhua
authors: Z
authors: Qiao
authors: ICQD, Hefei National Laboratory for Physical Sciences at Microscale, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.|CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors: Yulei
authors: Y
authors: Han
authors: Department of Physics and the Center of Theoretical and Computational Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, China.|State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, and Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China.
authors: Lei
authors: L
authors: Zhang
authors: ICQD, Hefei National Laboratory for Physical Sciences at Microscale, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.|CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors: Ke
authors: K
authors: Wang
authors: ICQD, Hefei National Laboratory for Physical Sciences at Microscale, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.|CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors: Xinzhou
authors: X
authors: Deng
authors: Department of Physics, The University of Texas at Austin, Austin, Texas 78712, USA.|College of Physics, Soochow University, Suzhou, Jiangsu 215006, China.
authors: Hua
authors: H
authors: Jiang
authors: Department of Physics, The University of Texas at Austin, Austin, Texas 78712, USA.|Research Laboratory for Quantum Materials, Singapore University of Technology and Design, Singapore 487372, Singapore.
authors: Shengyuan A
authors: SA
authors: Yang
authors: Department of Physics and the Center of Theoretical and Computational Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, China.
authors: Jian
authors: J
authors: Wang
authors: Department of Physics, The University of Texas at Austin, Austin, Texas 78712, USA.|ICQM and CICQM, School of Physics, Peking University, Beijing 100871, China.
authors: Qian
authors: Q
authors: Niu