1. Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
2. Key Laboratory of Optoelectronics Technology of Education Ministry of China, Faculty of Information Technology, Beijing University of Technology, Beijing 100124, China
3. State Key Laboratory of Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, P. R. China
4. Collaborative Innovation Center of Quantum Matter, Beijing 100871, P. R. China