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Updated: Jun 3, 2026

Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain
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Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain

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First-principles study on ferroelectricity at PbTiO3 surface steps.

T Shimada1, S Tomoda, T Kitamura

  • 1Department of Mechanical Engineering and Science, Kyoto University, Yoshida-hommachi, Sakyo-ku, Kyoto 606-8501, Japan. shimada@cyber.kues.kyoto-u.ac.jp

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|March 16, 2011
PubMed
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Ferroelectricity is enhanced at lead titanate (PbTiO3) surface steps with PbO termination due to stronger bonding. Compressive strain can induce a polydomain structure, stabilizing ferroelectric distortions at the surface.

Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Surface Science

Background:

  • Ferroelectricity in lead titanate (PbTiO3) is crucial for electronic devices.
  • Surface steps significantly influence material properties, including ferroelectricity.
  • Understanding surface effects is key to designing advanced ferroelectric materials.

Purpose of the Study:

  • Investigate ferroelectricity at PbTiO3 surface steps.
  • Analyze the impact of surface termination and strain on ferroelectric behavior.
  • Explain the formation of domain structures at surfaces.

Main Methods:

  • Ab initio density functional theory calculations.
  • Modeling of (100) and (001) surface steps with the polar axis in the [010] direction.

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Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain
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Published on: March 27, 2018

Epitaxial Growth of Perovskite Strontium Titanate on Germanium via Atomic Layer Deposition
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A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy

Published on: April 8, 2018

  • Application of tensile and compressive strain.

    • Main Results:

    • Ferroelectricity enhanced at PbO-terminated steps due to strengthened Pb-O covalent bonding.
    • Ferroelectric distortions suppressed at TiO2-terminated steps due to electron transfer.
    • Tensile strain in the [010] direction increased spontaneous polarization.
    • Compressive strain induced a polydomain structure with 90° and 180° domain walls.

    Conclusions:

    • Surface termination and strain critically affect ferroelectricity at PbTiO3 steps.
    • The polydomain structure stabilizes ferroelectric distortions by compensating surface charges.
    • This model explains experimentally observed domain wall pinning at surface steps.