1. Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 P. R. China
2. School of Materials Science and Engineering University of Science and Technology of China Hefei 230026 P. R. China
3. Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular Engineering and College of Engineering and BIC‐ESAT Peking University Beijing 100871 P. R. China
4. Department of Applied Physics Nanjing University of Science and Technology Nanjing 210094 P. R. China
5. Department of Physics and Center for Quantum Materials Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong SAR P. R. China
6. Center for Integrative Materials Discovery Department of Chemistry and Chemical and Biomedical Engineering University of New Haven 300 Boston Post Road West Haven CT 06516 USA
7. Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201204 P. R. China