1. Institute of Atomic
and Molecular Physics, Sichuan University, Chengdu 610065, China
2. Department of Physics, Nanyang Normal University, Nanyang 473061, China
3. Education
College of Information Technology, Hubei Nomal University, Huangshi 435002, China
4. Department
of Physics and High Pressure Science and Engineering Center, University of Nevada, Las Vegas, Nevada 89154, United States
5. Centre for Science at Extreme Conditions
and SUPA, School of Physics and Astronomy, The University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom