1. School of Materials Science and Engineering
2. Beihua University
3. Jilin 132013
4. China
5. Department of Physics
6. School of Sciences
7. Department of Chemistry
8. State University of New York at Buffalo
9. Buffalo
10. USA
11. International Center of Computational Methods & Software and State Key Laboratory for Superhard Materials
12. College of Physics
13. Changchun 130012