1. Beijing
National Laboratory for Condensed Matter Physics and Institute of
Physics, Chinese Academy of Sciences, Beijing 100190, China
2. Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China
3. College of Physics and Electronic Information, Gannan Normal University, Ganzhou, Jiangxi 341000, China
4. Collaborative Innovation Center of Quantum Matter, Beijing 100190, China
5. Beijing Key Laboratory for Nanomaterials and Nanodevices, Beijing 100190, China