1. Electronic Materials Research Laboratory
2. Key Laboratory of the Ministry of Education & International Center for Dielectric Research
3. School of Electronic and Information Engineering
4. Xi'an Jiaotong University
5. Xian 710049
6. Department of Applied Science and Technology
7. Institute of Materials Physics and Engineering
8. Corso Duca degli Abruzzi 24
9. 10129 Torino
10. Italy
11. School of Biological and Chemical Sciences
12. Queen Mary University of London
13. London E1 4NS
14. UK
15. Materials Research Institute
16. School of Engineering and Materials Science