1. Faculty of Chemistry and Chemical Engineering, Engineering Research Center of Advanced Ferroelectric Functional Materials, Key Laboratory of Phytochemistry of Shaanxi Province, Baoji University of Arts and Sciences, 1 Hi-Tech Avenue, Baoji, Shaanxi, 721013, China
2. State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
3. School of Aerospace Science & Technology, Xidian University, Xi'an, 710071, P. R. China
4. Institute for Solid State Physics, The University of Tokyo, Koto, Sayo, Hyogo 679-5148, Japan
5. Department of Advanced Materials Science, Faculty of Engineering and Design, Kagawa University, 2217-20 Hayashi-cho, Takamatsu-shi, 761-0396, Japan
6. School of Microelectronics, Xi'an Jiaotong University, Xi'an 710049, China
7. Department of Materials Science and Engineering, Faculty of Engineering, University of Moratuwa, Katubedda, Sri Lanka
8. Electrical Insulation Research Center, Institute of Materials Science, University of Connecticut, 97 N Eagleville Rd, Storrs, CT 06269, USA