1. State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
3. Laboratory of Solid Quantum Material Center, College of Physics and Electronic Engineering, Shanxi University, Taiyuan 030006, China
4. Beijing Academy of Quantum Information Sciences, Beijing 100193, China