1. International Center for Quantum Materials and School of Physics, Peking University, Beijing 100871, People’s Republic of China
2. Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195, United States
3. School of Physics, Liaoning University, Shenyang 110036, People’s Republic of China
4. Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials, State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Frontier Science Center for Nano-optoelectronics and School of Physics, Peking University, Beijing 100871, People’s Republic of China