1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China.
2. School of Physical Science and Technology, ShanghaiTech University, Shanghai 200031, China.
3. State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China.
4. University of Chinese Academy of Sciences, Beijing 100049, China.
5. School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China.
6. State Key Laboratory of Polymers Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
7. Aalto University School of Science, Department of Applied Physics, PO Box 15100, FI-00076 Aalto, Espoo, Finland.
8. Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen 518055, China.