1. School of Physics Southeast University Nanjing 211189 China
2. Laboratory of Solid State Microstructures Nanjing University Nanjing 210093 China
3. Institute for Advanced Materials Hubei Normal University Huangshi 435002 China
4. Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions, CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, High Magnetic Field Laboratory of Chinese Academy of Sciences (CHMFL), HFIPS Chinese Academy of Sciences Hefei 230031 China
5. Science Island Branch of Graduate School University of Science and Technology of China Hefei 230026 China