1. Hefei National Research Center for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, China.
2. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
3. School of Physics, Northwest University, Xi’an 710127, China.
4. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China.
5. Beijing National Center for Electron Microscopy and Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
6. Institut für Festkörperphysik, TU Wien, 1040 Vienna, Austria.
7. Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China.
8. Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.