1. High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, Anhui, China
2. Ningbo University of Technology, Ningbo 315211, Zhejiang, China
3. Department of Physics and Engineering Physics, Tulane University, New Orleans, Louisiana 70118, USA
4. Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China