1. State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, P. R. China
2. Department of Physics and Electronic Engineering, Hebei Normal University for Nationalities, Chengde, 067000, China
3. Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo, 315211, P. R. China
4. Institute for Disaster Management and Reconstruction, Sichuan University - the Hong Kong Polytechnic University, Chengdu, 610207, China
5. Asian School of the Environment and School of Materials Science and Engineering, 50 Nanyang Avenue, Nanyang Technological University, 639798, Singapore
6. Department of Materials Science & Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, UK
7. Advanced Institute for Materials Research, Tohoku University 2-1-1 Katahira, Aoba, Sendai, 980-8577, Japan