1. Institute of Theoretical Physics, Department of Physics, University of Science and Technology, Beijing, Beijing 100083, China
2. Henan Key Laboratory of Diamond Optoelectronic Materials and Devices, Key Laboratory of Material Physics, Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China
3. School of Science, Xi’an Polytechnic University, Xi’an 710048, China