1. Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
2. School of Physics, University of Chinese Academy of Sciences, Beijing 100049, China
3. Department of Physics, National University of Singapore, Singapore 117542, Singapore
4. State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
5. Institute for Advanced Study, Tsinghua University, Beijing 100084, China
6. Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
7. RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan
8. Songshan Lake Materials Laboratory, Dongguan 523808, China