1. School of Physics, Peking University, Beijing 100871, People’s Republic of China
2. International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, People’s Republic of China
3. Max Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany
4. Collaborative Innovation Center of Quantum Matter, Beijing 100871, People’s Republic of China
5. Songshan Lake Materials Laboratory, Institute of Physics, Chinese Academy of Sciences, Guangdong, China
6. Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials, Peking University, Beijing 100871, China
7. University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom