1. School of Materials Science and Engineering Peking University Beijing 100871 China
2. Vacuum Interconnected Nanotech Workstation Suzhou Institute of Nano‐Tech and Nano‐Bionics Chinese Academy of Sciences Suzhou 215123 China
3. School of Physics Peking University Beijing 100871 China
4. State Key Laboratory for Artificial Microstructure and Mesoscopic Physics School of Physics Peking University Beijing 100871 China
5. Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of Education Taiyuan University of Technology Taiyuan 030024 China
6. Interdisciplinary Institute of Light‐Element Quantum Materials and Research Center for Light‐Element Advanced Materials Peking University Beijing 100871 China