1. State Key Laboratory of Superhard Materials, Department of Physics, Jilin University, Changchun 130012, People’s Republic of China
2. Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, People’s Republic of China
3. National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, People’s Republic of China
4. School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, People’s Republic of China
5. State Key Laboratory of Surface Physics, Department of Physics, Fudan University Shanghai 200438, People’s Republic of China
6. Hawaii Institute of Geophysics & Planetology, University of Hawaii Manoa, Honolulu, Hawaii 96822, United States