Ferroelectricity in ultra-thin perovskite films

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We report studies of ferroelectricity in ultra-thin perovskite films with realistic electrodes. The results reveal stable ferroelectric states in thin films less than 10 Åthick 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 PbTiO$_3$ and BaTiO$_3$ films.
4 pages in REVTEX4, 4 epsf figures

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Materials Science

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http://salesiana.dossiersoluciones.com/handle/123456789/26304

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0505051
 http://arxiv.org/abs/cond-mat/0505051
 Phys. Rev. B 72, 020101(R) (2005)
 doi:10.1103/PhysRevB.72.020101

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arXiv