1. School of Physics & Wuhan National High Magnetic Field Center; Huazhong University of Science and Technology; Wuhan 430074 China
2. School of Physics; Southeast University; Nanjing 211189 China
3. Laboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures; Nanjing University; Nanjing 210093 China
4. Institute for Advanced Materials; Hubei Normal University; Huangshi 435001 China