1. Division of Molecule and Materials Simulation, State Key Laboratory of Organic−Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
2. Deptment of Physics, Tianjin Polytechnic University, Tianjin 300160 China
3. State Key Lab of Superhard Materials, Department of Materials Science and Key Laboratory of Automobile Materials of MOE, Jilin University, Changchun 130012, China