1. School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
2. Center for Nanoscale Characterization & Devices, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
3. Guangxi Key Laboratory of Optical and Electronic Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China
4. Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China