1. Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
2. Sino-Danish College, University of Chinese Academy of Sciences, Beijing 100049, China
3. Spallation Neutron Source Science Center, Dongguan 523803, China
4. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Science, Beijing 100190, China
5. Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China