1. State Key Laboratory for Mesoscopic PhysicsSchool of PhysicsPeking University Beijing 100871 China
2. Electron Microscopy LaboratorySchool of PhysicsPeking University Beijing 100871 China
3. Collaborative Innovation Center of Quantum Matter Beijing 100084 China
4. Institute for Quantum Science and Technology and Department of PhysicsSouth University of Science and Technology of China (SUSTech) Shenzhen 518055 China
5. International Center for Quantum MaterialsSchool of PhysicsPeking University Beijing 100871 China