1. Key
Laboratory of Engineering Dielectrics and Its Application, Ministry
of Education, Harbin University of Science and Technology, 52 Xuefu Road, Harbin, Heilongjiang 150080, P. R. China
2. State
Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, 4 second Section
on Jianshe North Road, Chengdu, Sichuan 610054, P. R. China
3. Key
Laboratory of Functional Materials Physics and Chemistry, Ministry of Education, Jilin Normal University, 1301 Haifeng Street, Siping, Jilin 136000, P. R. China