1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure
2. Shanghai Institute of Ceramics
3. Chinese Academy of Science
4. Shanghai 200050
5. China
6. Department of Physics
7. South University of Science and Technology of China
8. Shenzhen 518055
9. Materials Science and Engineering
10. Northwestern University
11. Evanston IL 60208
12. USA
13. Institute of Atomic and Molecular Sciences
14. Academia Sinica
15. Taipei 10617
16. Taiwan