1. Institute for Computational Materials Science, School of Physics and Electronics, Henan University, Kaifeng 475004, China
2. International Joint Research Laboratory of New Energy Materials and Devices of Henan Province, Kaifeng 475004, China
3. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China
4. Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230026, China