1. National Laboratory of Solid State Microstructures and Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
2. Research Institute of Superconductor Electronics, Nanjing University, 210093 Nanjing, China
3. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
4. Purple Mountain Laboratories, Nanjing 211111, China