Affiliation: | 1. Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, Xi'an Jiaotong University, Xi'an 710049, China;2. International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an 710049, China;3. Department of Applied Physics, School of Science, Xi'an Jiaotong University, Xi'an 710049, China |