1. School of Science, University of Science and Technology, Liaoning, Anshan 114051, China
2. School of Materials and Metallurgy, University of Science and Technology, Liaoning, Anshan 114051, China
3. School of Physics and Electronic Engineering, Linyi University, Linyi 276005, China
4. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China