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Title: Photoinduced Domain Pattern Transformation in Ferroelectric-Dielectric Superlattices

Journal Article · · Physical Review Letters
 [1];  [1];  [1];  [1];  [1];  [1];  [2];  [3];  [2];  [1]
  1. Univ. of Wisconsin, Madison, WI (United States). Dept. of Materials Science and Engineering
  2. Stony Brook Univ., NY (United States). Dept. of Physics and Astronomy
  3. 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
Citation Metrics:
Cited by: 17 works
Citation information provided by
Web of Science

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