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Polarization enhancement in short period superlattices via interfacial intermixing

Valentino R. Cooper, Karen Johnston, and Karin M. Rabe
Phys. Rev. B 76, 020103(R) – Published 16 July 2007

Abstract

The effect of intermixing at the interface of short period PbTiO3SrTiO3 superlattices is studied using first-principles density functional theory. The results indicate that interfacial intermixing significantly enhances the polarization within the superlattice. This enhancement is directly related to the off-centering of Pb and Sr cations and can be explained through a discussion of interacting dipoles. This picture should be general for a wide range of multicomponent superlattices and may have important consequences for the design of ferroelectric devices.

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  • Received 22 May 2007

DOI:https://doi.org/10.1103/PhysRevB.76.020103

©2007 American Physical Society

Authors & Affiliations

Valentino R. Cooper1,*, Karen Johnston2, and Karin M. Rabe1

  • 1Department of Physics and Astronomy, Rutgers University, 136 Frelinghuysen Road, Piscataway, New Jersey 08854-8019, USA
  • 2Laboratory of Physics, Helsinki University of Technology, P.O. Box 1100, 02015, Finland

  • *vcooper@physics.rutgers.edu

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Issue

Vol. 76, Iss. 2 — 1 July 2007

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