1. School
of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
2. Shanghai
Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
3. School
of Engineering, The University of Tokyo, Tokyo 1138656, Japan
4. John
A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
5. School
of Renewable Energy, North China Electric Power University, Beijing 102206, China
6. Ion Beam
Physics, ETH Zurich, CH-8093 Zurich, Switzerland
7. Beijing
National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China
8. Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
9. Institute
of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China