Photoinduced Domain Pattern Transformation in Ferroelectric-Dielectric Superlattices
Journal Article
·
· Physical Review Letters
The nanodomain pattern in ferroelectric/dielectric superlattices transforms to a uniform polarization state under above-bandgap optical excitation. X-ray scattering reveals a disappearance of domain diffuse scattering and an expansion of the lattice. The reappearance of the domain pattern occurs over a period of seconds at room temperature, suggesting a transformation mechanism in which charge carriers in long-lived trap states screen the depolarization field. A Landau-Ginzburg-Devonshire model predicts changes in lattice parameter and a critical carrier concentration for the transformation.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE Office of Science - Office of Basic Energy Sciences
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1389647
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 5 Vol. 119; ISSN 0031-9007; ISSN PRLTAO
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
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journal | January 2020 |
Optical creation of a supercrystal with three-dimensional nanoscale periodicity
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