Affiliation: | 1. Department of Physics, The Chinese University of Hong Kong, Hong Kong, China;2. Materials Science and Technology Research Center, The Chinese University of Hong Kong, Hong Kong, China;3. Faculty of Physics and Electronic Technology, The Hubei Province Key Laboratory of Ferroelectric and Piezoelectric Materials and Devices, Hubei University, Wuhan 430062, PR China;4. Department of Electronics Engineering, The Chinese University of Hong Kong, Hong Kong, China;5. School of Electronic Engineering, Computer and Mathematic, University of Surrey, Guildford, Surrey GU2 7XH, UK |