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 Physics and Center for Quantum Materials, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, P. R. China
5. State Key Laboratory of Coal Conversion, Institute Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P. R. China
6. University of Chinese Academy of Science, No. 19A Yuanquan Road, Beijing 100049, P. R. China
7. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, P. R. China
8. Center for Integrative Materials Discovery, Department of Chemistry and Chemical Engineering, University of New Haven, 300 Boston Post Road, West Haven, Connecticut 06516, United States