1. MIIT Key Laboratory of Advanced Metallic and Intermetallic Materials Technology School of Materials Science and Engineering Nanjing University of Science and Technology Nanjing 210094 China
2. Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials School of Electronic Science and Engineering Nanjing University Nanjing 210093 China
3. York‐Nanjing Joint Center (YNJC) for Spintronics and Nanoengineering Department of Electronic Engineering University of York York YO10 5DD UK
4. School of Electronics and Information Northwestern Polytechnical University 127 West Youyi Road Xi'an Shanxi 710072 China
5. Department of Physics National University of Singapore 2 Science Drive 3 Singapore 117542 Singapore
6. Centre for Advanced 2D Materials and Graphene Research Centre National University of Singapore 6 Science Drive 2 Singapore 117546 Singapore
7. Department of Physics University of York York YO10 5DD UK
8. Singapore Synchrotron Light Source National University of Singapore 5 Research Link Singapore 117603 Singapore