1. State
Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, China
2. School
of Advanced Materials, Peking University Shenzhen Graduate School, Shenzhen 518055, China
3. State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications & School of Science, Beijing 100876, China
4. Department
of Nuclear Science and Engineering and Department of Materials Science
and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
5. Key Laboratory for Intelligent Nano Materials and Devices of the Ministry of Education, Beijing 100871, China
6. Collaborative Innovation Center of Quantum Matter, Beijing 100871, China