1. State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano‐optoelectronics School of Physics Peking University Beijing 100871 China
2. Collaborative Innovation Center of Quantum Matter School of Physics Peking University Beijing 100871 China
3. Electron Microscopy Laboratory School of Physics Peking University Beijing 100871 China
4. Microsystem and Terahertz Research Center China Academy of Engineering Physics Chengdu 610299 China
5. School of Electronic Science and Engineering University of Electronic Science and Technology of China Chengdu 611731 China
6. State Key Laboratory of Superlattices and Microstructures (SKLSM) Institute of Semiconductors Chinese Academy of Science P.O. Box 912 Beijing 100083 China
7. Chinese Academy of Science (CAS) Center for Excellence in Topological Quantum Computation University of Chinese Academy of Sciences Beijing 100190 China