1. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
2. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
3. College of Physics, Sichuan University, Chengdu 610065, China
4. Center for High Pressure Science & Technology Advanced Research, Beijing 100190, China
5. Department of Physics, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China