Photoinduced Domain Pattern Transformation in Ferroelectric-Dielectric Superlattices
Journal Article
·
· Physical Review Letters
- Univ. of Wisconsin, Madison, WI (United States). Dept. of Materials Science and Engineering
- Stony Brook Univ., NY (United States). Dept. of Physics and Astronomy
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source
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. Furthermore, 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:
- Univ. of Wisconsin, Madison, WI (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- FG02-04ER46147; AC02-06CH11357
- OSTI ID:
- 1389728
- Alternate ID(s):
- OSTI ID: 1373430
- Journal Information:
- Physical Review Letters, Vol. 119, Issue 5; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 17 works
Citation information provided by
Web of Science
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