Preventing the Reconstruction of the Polar Discontinuity at Oxide Heterointerfaces

J.A. Boschker, J. Verbeeck, R. Egoavil, S. Bals, G. van Tendeloo, Mark Huijben, Evert Pieter Houwman, Gertjan Koster, David H.A. Blank, Augustinus J.H.M. Rijnders

Research output: Contribution to journalArticleAcademicpeer-review

61 Citations (Scopus)

Abstract

Perovskite oxide heteroepitaxy receives much attention because of the possibility to combine the diverse functionalities of perovskite oxide building blocks. A general boundary condition for the epitaxy is the presence of polar discontinuities at heterointerfaces. These polar discontinuities result in reconstructions, often creating new functionalities at the interface. However, for a significant number of materials these reconstructions are unwanted as they alter the intrinsic materials properties at the interface. Therefore, a strategy to eliminate this reconstruction of the polar discontinuity at the interfaces is required. We show that the use of compositional interface engineering can prevent the reconstruction at the La0.67Sr0.33MnO3/SrTiO3 (LSMO/STO) interface. The polar discontinuity at this interface can be removed by the insertion of a single La0.33Sr0.67O layer, resulting in improved interface magnetization and electrical conductivity.
Original languageEnglish
Pages (from-to)2235-2240
Number of pages6
JournalAdvanced functional materials
Volume22
Issue number11
DOIs
Publication statusPublished - 2012

Keywords

  • METIS-288503
  • IR-81882

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