1. International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, P. R. China
2. State Key Laboratory for Mesoscopic Physics, Frontiers Science Centre for Nano-optoelectronics, School of Physics, Peking University, Beijing 100871, P. R. China
3. Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials, Peking University, Beijing 100871, P. R. China
4. Collaborative Innovation Center of Quantum Matter, Beijing 100871, China