1. National Laboratory of Solid-State Microstructures, Collaborative Innovation Center of Advanced Microstructures, School of Physics, Nanjing University, Nanjing 210093, China
2. Institute of Atom Manufacturing Suzhou Campus, Department, Nanjing University, Nanjing 215163, China
3. School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
4. Department of Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, China
5. School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China