1. School of Materials Science and Engineering, Peking University, Beijing 100871, China
2. Functional Crystals Lab, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
3. State Key Lab of Superhard Materials, Jilin University, Changchun 130012, China
4. Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing 100193, China