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Title: Photoinduced Domain Pattern Transformation in Ferroelectric-Dielectric Superlattices

Abstract

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.

Authors:
 [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
Publication Date:
Research Org.:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1389728
Grant/Contract Number:
FG02-04ER46147; AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 119; Journal Issue: 5; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Ahn, Youngjun, Park, Joonkyu, Pateras, Anastasios, Rich, Matthew B., Zhang, Qingteng, Chen, Pice, Yusuf, Mohammed H., Wen, Haidan, Dawber, Matthew, and Evans, Paul G. Photoinduced Domain Pattern Transformation in Ferroelectric-Dielectric Superlattices. United States: N. p., 2017. Web. doi:10.1103/PhysRevLett.119.057601.
Ahn, Youngjun, Park, Joonkyu, Pateras, Anastasios, Rich, Matthew B., Zhang, Qingteng, Chen, Pice, Yusuf, Mohammed H., Wen, Haidan, Dawber, Matthew, & Evans, Paul G. Photoinduced Domain Pattern Transformation in Ferroelectric-Dielectric Superlattices. United States. doi:10.1103/PhysRevLett.119.057601.
Ahn, Youngjun, Park, Joonkyu, Pateras, Anastasios, Rich, Matthew B., Zhang, Qingteng, Chen, Pice, Yusuf, Mohammed H., Wen, Haidan, Dawber, Matthew, and Evans, Paul G. 2017. "Photoinduced Domain Pattern Transformation in Ferroelectric-Dielectric Superlattices". United States. doi:10.1103/PhysRevLett.119.057601.
@article{osti_1389728,
title = {Photoinduced Domain Pattern Transformation in Ferroelectric-Dielectric Superlattices},
author = {Ahn, Youngjun and Park, Joonkyu and Pateras, Anastasios and Rich, Matthew B. and Zhang, Qingteng and Chen, Pice and Yusuf, Mohammed H. and Wen, Haidan and Dawber, Matthew and Evans, Paul G.},
abstractNote = {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.},
doi = {10.1103/PhysRevLett.119.057601},
journal = {Physical Review Letters},
number = 5,
volume = 119,
place = {United States},
year = 2017,
month = 7
}

Journal Article:
Free Publicly Available Full Text
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  • 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.
  • Complex-oxide superlattices (SLs) with atomic-scale periodicity have dynamical properties that are distinct from thin films of uniform composition. The origins of these properties are closely related to the dynamics of polarization domains and to field-driven changes in the symmetries resulting from interfacial coupling between different components. These dynamics are apparent at timescales from a few nanoseconds to several milliseconds in experiments probing the piezoelectricity of a ferroelectric/dielectric BaTiO{sub 3}(BTO)/CaTiO{sub 3} (CTO) SL using time-resolved x-ray microdiffraction. At the 100 ns timescale, the piezoelectric distortion is approximately ten times smaller than in the millisecond regime. This reduced piezoelectricity at short timescalesmore » is not observed in previously studied PbTiO{sub 3}/SrTiO{sub 3} SLs or compositionally uniform ferroelectrics such as tetragonal compositions of Pb(Zr,Ti)O{sub 3}. The unusual behavior of the BTO/CTO SL can be linked to the switching of a nanodomain state into a uniform polarization state or to a field-induced crystallographic symmetry transition. A comparison of the results with the characteristic timescales of these two dynamical phenomena in other complex oxides with different compositions suggests that the phase transition is a more likely possibility.« less
  • The origin of the functional properties of complex oxide superlattices can be resolved using time-resolved synchrotron x-ray diffraction into contributions from the component layers making up the repeating unit. The CaTiO{sub 3} layers of a CaTiO{sub 3}/BaTiO{sub 3} superlattice have a piezoelectric response to an applied electric field, consistent with a large continuous polarization throughout the superlattice. The overall piezoelectric coefficient at large strains, 54 pm/V, agrees with first-principles predictions in which a tetragonal symmetry is imposed on the superlattice by the SrTiO{sub 3} substrate.
  • The origin of the functional properties of complex oxide superlattices can be resolved using time-resolved synchrotron x-ray diffraction into contributions from the component layers making up the repeating unit. The CaTiO{sub 3} layers of a CaTiO{sub 3}/BaTiO{sub 3} superlattice have a piezoelectric response to an applied electric field, consistent with a large continuous polarization throughout the superlattice. The overall piezoelectric coefficient at large strains, 54 pm/V, agrees with first-principles predictions in which a tetragonal symmetry is imposed on the superlattice by the SrTiO{sub 3} substrate.