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

doi:10.1002/adma.201301841

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

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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 language	English (US)
Pages (from-to)	4043-4048
Number of pages	6
Journal	Advanced Materials
Volume	25
Issue number	29
DOIs	https://doi.org/10.1002/adma.201301841
State	Published - Aug 7 2013

Keywords

interface engineering
manganite
molecular-beam epitaxy
perovskite
surface diffraction

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AU - Torrelles, X.

AU - Verna, A.

AU - Xu, H.

AU - Cossaro, A.

AU - Pedio, M.

AU - Garcia-Barriocanal, J.

AU - Castro, G. R.

AU - Davidson, B. A.

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Surface octahedral distortions and atomic design of perovskite interfaces

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