1. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
2. College of Physics, Jilin University, Changchun 130012, China
3. Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
4. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, China