1. School of Physical Science and Technology, Key Laboratory of Advanced Technologies of Materials, Ministry of Education of China, Southwest Jiaotong University, Chengdu, People’s Republic of China
2. Sichuan Provincial Key Laboratory (for Universities) of High Pressure Science and Technology, Southwest Jiaotong University, Chengdu, People’s Republic of China
3. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, People’s Republic of China