1. Institute of Condensed Matter Physics, Linyi University, Linyi 276005, People's Republic of China
2. Beijing Computational Science Research Center, Beijing 100084, People's Republic of China
3. State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People's Republic of China
4. Department of Physics and Materials Science, City University of Hong Kong, Hong Kong