1. School of Physics, State Key Lab for Mesoscopic Physics, Peking University, Beijing 100871, China
2. Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
3. Key Laboratory of Nanoscale Measurement and Standardization, National Center for Nanoscience and Technology, Beijing 100190, China
4. Collaborative Innovation Center of Quantum Matter, Beijing 100871, China