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Photoinduced Domain Pattern Transformation in Ferroelectric-Dielectric Superlattices.
Ahn, Youngjun; Park, Joonkyu; Pateras, Anastasios; Rich, Matthew B; Zhang, Qingteng; Chen, Pice; Yusuf, Mohammed H; Wen, Haidan; Dawber, Matthew; Evans, Paul G.
  • Ahn Y; Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
  • Park J; Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
  • Pateras A; Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
  • Rich MB; Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
  • Zhang Q; Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
  • Chen P; Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
  • Yusuf MH; Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794, USA.
  • Wen H; Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Dawber M; Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794, USA.
  • Evans PG; Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
Phys Rev Lett ; 119(5): 057601, 2017 Aug 04.
Article en En | MEDLINE | ID: mdl-28949700
ABSTRACT
The nanodomain pattern in ferroelectric-dielectric superlattices transforms to a uniform polarization state under above-band-gap 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.
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Texto completo: 1 Banco de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Año: 2017 Tipo del documento: Article
Texto completo
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Texto completo: 1 Banco de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Año: 2017 Tipo del documento: Article