1. College
of Physics and Electronic Information, Luoyang Normal University, Luoyang 471022, China
2. Beijing Computational Science Research Center, Beijing 10084, China
3. Department
of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E2, Canada
4. Canadian Light Source, Saskatoon, Saskatchewan S7N 2 V3, Canada
5. State
Key Lab of Superhard Materials, Jilin University, Changchun 130012, China