1. Electronic
Materials Research
Laboratory, Key Laboratory of the Ministry of Education, Xi’an Jiaotong University, Xi’an 710049,
Shaanxi, China
2. International
Center for Dielectric
Research, Xi’an Jiaotong University, Xi’an 710049. China
3. Micro-optoelectronic Systems Laboratories, Xi’an Technological University, Xi’an
710032, Shaanxi, China
4. Center for Dielectric Studies,
Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802, United States