1. Department of Materials Science and Engineering; College of Engineering; Peking University; Beijing 100871 China
2. Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials; Hubei Key Laboratory of Ferro and Piezoelectric Materials and Devices; Faculty of Physics and Electronic Science; Hubei University; Wuhan 430062 China
3. Research Center for Wide Gap Semiconductor; Peking University; Beijing 100871 China
4. Division of Nanophotonics; CAS Key Laboratory of Standardization and Measurement for Nanotechnology; CAS Center for Excellence in Nanoscience; National Center for Nanoscience and Technology; Beijing 100190 China
5. Center for Nanochemistry (CNC); Academy for Advanced Interdisciplinary Studies; Beijing National Laboratory for Molecular Sciences; College of Chemistry and Molecular Engineering; Peking University; Beijing 100871 China
6. Electron Microscopy Laboratory, and International Center for Quantum Materials; School of Physics; Peking University; Beijing 100871 China
7. Collaborative Innovation Center of Quantum Matter; Beijing 100871 China