1. School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
2. Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
3. Kavli Institute for Theoretical Sciences and CAS Center of Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China