1. State Key Laboratory of Low Dimensional Quantum Physics and Department of PhysicsTsinghua University Beijing 100084 China
2. Key Laboratory of Computational Physical Sciences (Ministry of Education)State Key Laboratory of Surface Physics, and Department of PhysicsFudan University Shanghai 200433 China
3. National Center for Electron Microscopy in BeijingKey Laboratory of Advanced Materials (MOE) Beijing 100084 China
4. State Key Laboratory of New Ceramics and Fine ProcessingSchool of Materials Science and EngineeringTsinghua University Beijing 100084 China
5. Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of Sciences Beijing 100190 China
6. Collaborative Innovation Center of Quantum Matter Beijing 100084 China
7. International Center for Quantum MaterialsSchool of PhysicsPeking University Beijing 100871 China
8. Department of Mechanical EngineeringTsinghua University Beijing 100084 China
9. Advanced Light SourceLawrence Berkeley National Laboratory Berkeley 94720 CA USA
10. Department of PhysicsDurham University Durham DH13LE UK
11. School of Physical SciencesUniversity of Chinese Academy of Sciences Beijing 100049 China
12. Collaborative Innovation Center of Advanced Microstructures Nanjing 210093 China
13. RIKEN Center for Emergent Matter Science (CEMS) Saitama 351‐0198 Japan