1. Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparation Technology, School of Science, Tianjin University, Tianjin 300354, China
2. Research Laboratory for Quantum Materials, Singapore University of Technology and Design, Singapore 487372, Singapore
3. College of Physics, Hebei Key Laboratory of Photophysics Research and Application, Hebei Normal University, Shijiazhuang 050024, China
4. Tianjin Demonstration Center for Experimental Physics Education, School of Science, Tianjin University, Tianjin 300354, China