1. School of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China
2. Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China
3. Division of Nanophotonics, CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
4. The State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, China