Intrinsic dynamics of the electric-field-induced phase switching in antiferroelectric ultrathin films
- Univ. of South Florida, Tampa, FL (United States). Dept. of Physics
Antiferroelectric ultrathin PbZrO3 films can exhibit both ferroelectric and antiferroelectric behavior depending on the thickness. We use first-principles-based nanoscopic simulations to investigate the intrinsic high-frequency dynamics of the electric-field-induced phase switching in such films which so far remains unknown. Here in this comprehensive study we report (i) the size and frequency evolution of the polarization response to the electric field;(ii)the intrinsic time for the phase switching; (iii) detailed comparison between the polarization reversal in the films with ferroelectric and antiferroelectric behavior; (iv) dynamics of the antiferroelectric and antiferrodistortive order parameters; (v) nanoscopic mechanism responsible for the phase switching. The nanoscopic insight leads to the prediction of the existence of two possible scenarios for the antipolar-polar phase switching depending on the mutual orientation of the antiferroelectric order parameter and the electric field. The two scenarios have different dynamical fingerprints. The polar-antipolar phase switching is found to be assisted by the formation of a nonpolar phase. Computational data indicate that the phase switching time is only fractions of nanoseconds for the polar-polar phase switching in ferroelectric films and polar-antipolar phase switching in antiferroelectric films. The antipolar-polar phase switching in antiferroelectric films is just a bit slower and takes the order of nanosecond. Under nonequilibrium conditions we find formation of antiferroelectric and antiferrodistortive nanodomains and coexistence of polar and antipolar order parameters.
- Research Organization:
- Univ. of South Florida, Tampa, FL (United States). Dept. of Physics
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Contributing Organization:
- USF Research Computing, sponsored in part by National Science Foundation (NSF) MRI CHE-1531590
- Grant/Contract Number:
- SC0005245
- OSTI ID:
- 1465752
- Alternate ID(s):
- OSTI ID: 1465609
- Journal Information:
- Physical Review B, Vol. 98, Issue 5; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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36 MATERIALS SCIENCE
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25 ENERGY STORAGE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
Antiferroelectricity
Domains
Ferroelectricity
Order parameters
Ultra thin filmsl Molecular dynamicsl Metropolis algorithm
Phase transitions