1. Department of Physics, Beijing Key Laboratory of Opto-Electronic Functional Materials and Micro-nano Devices, Renmin University of China, Beijing 100872, China
2. Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
3. School of Physical Sciences, University of Chinese Academy of Science, Beijing 100190, China
4. Beijing Key Laboratory for Nanomaterials and Nanodevices, Beijing 100190, China
5. Collaborative Innovation Center of Quantum Matter, Beijing 100190, China