1. College of Science, Nanjing University of Posts and Telecommunications 1 , Nanjing 210023, China
2. Weifang University of Science and Technology 2 , Shouguang 262700, China
3. School of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications 3 , Chongqing 400065, China
4. School of Science, Jiangsu University of Science and Technology 4 , Zhenjiang 212001, China
5. Institute for Computational Materials Science, Joint Center for Theoretical Physics (JCTP), School of Physics and Electronics, Henan University 5 , Kaifeng 475004, China
6. College of Physics Science and Technology, Yangzhou University 6 , Yangzhou 225002, China