1. Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun 130024, China
2. Department of Physics, Rutgers University, Newark, NJ 07102, USA
3. International Center for Computational Method & Software and State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
4. Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education),College of Physics, Jilin University, Changchun 130012, China