1. Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences , Beijing 100190 , China
2. Spallation Neutron Source Science Center , Dongguan 523803 , China
3. Department of Physics & Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences , Beijing 100049 , China
4. Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences , Ningbo 315201 , China
5. Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
6. Songshan Lake Materials Laboratory , Guangdong 523808 , China
7. National Center for Electron Microscopy in Beijing and School of Materials Science and Engineering, Tsinghua University , Beijing 100084 , China
8. Department of Physics, Southern University of Science and Technology , Shenzhen 518055 , China
9. School of Physics, Zhejiang University , Hangzhou 310027 , China