Ferroelectricity in ultrathin perovskite films

2005/05/03 by Na Sai, Alexie M. Kolpak, Andrew M. Rappe · 9 citations
Engineering · Materials Science · Physics and Astronomy · #Acoustic Wave Resonator Technologies #Ferroelectric and Piezoelectric Materials #Multiferroics and related materials #cond-mat.mtrl-sci

paper · pdf · doi:10.1103/physrevb.72.020101

published as Phys. Rev. B 72, 020101(R) (2005) · 4 pages in REVTEX4, 4 epsf figures

arxiv created 2005/05/03 · openalex publication_date 2005/07/07 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We report studies of ferroelectricity in ultrathin perovskite films with realistic electrodes. The results reveal stable ferroelectric states in thin films less than 10\phantom\rule0.3em0ex\mathrm\AA thick with polarization normal to the surface. Under short-circuit boundary conditions, the screening effect of realistic electrodes and the influence of real metal-oxide interfaces on thin film polarization are investigated. Our studies indicate that metallic screening from the electrodes is affected by the difference in work functions at oxide surfaces. We demonstrate this effect in ferroelectric PbTiO₃ and BaTiO₃ films.

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