1. Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
2. Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai 201800, China
3. School of Physics and Optoelectronic Engineering, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, China
4. Departament de Física, Universitat Politècnica de Catalunya, Campus Nord B4−B5, Barcelona 08034, Spain
5. Departamento de Física Aplicada-ICMUV, MALTA Consolider Team, Universidad de Valencia, Edificio de Investigación, C/Dr. Moliner 50, Burjassot, Valencia 46100, Spain
6. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
7. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China