Surface octahedral distortions and atomic design of perovskite interfaces

A. Yu Petrov, X. Torrelles, A. Verna, H. Xu, A. Cossaro, M. Pedio, J. Garcia-Barriocanal, G. R. Castro, B. A. Davidson

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Atomic engineering of perovskite films and interfaces is significantly improved by in situ optimization of reflection high-energy electron diffraction (RHEED) features resulting from surface BO6 octahedral rotations seen during molecular-beam epitaxy growth. This approach yields Sr-doped manganite films across the phase diagram with magnetotransport properties that are, for the first time, identical to bulk single crystals. Careful structural analysis of manganite/titanate interfaces shows that cation intermixing and unit cell dilations are eliminated, while BO6 rotations and Jahn-Teller-type elongations are nearly completely suppressed at the interface.

Original languageEnglish (US)
Pages (from-to)4043-4048
Number of pages6
JournalAdvanced Materials
Volume25
Issue number29
DOIs
StatePublished - Aug 7 2013

Keywords

  • interface engineering
  • manganite
  • molecular-beam epitaxy
  • perovskite
  • surface diffraction

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