Polarization enhancement in short period superlattices via interfacial intermixing

V.R. Cooper, K. Johnston, K.M. Rabe

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

The effect of intermixing at the interface of short period PbTiO3 SrTiO3 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.
Original languageEnglish
Article number020103
Number of pages4
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume76
Issue number2
DOIs
Publication statusPublished - 16 Jul 2007

Keywords

  • PbTiO3
  • SrTiO3
  • superlattices
  • multicomponent superlattices
  • ferroelectric devices

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