Evidence of Orbital Reconstruction at Interfaces in Ultrathin La0.67Sr0.33MnO3 Films.

A. Tebano, C. Aruta, Simone Sanna, P.G. Medaglia, G. Balestrino, A.A. Sidorenko, R. De Renzi, G. Ghiringhelli, L. Braicovich, V. Bisogni, N.B. Brookes

Research output: Contribution to journalJournal articlepeer-review

Abstract

Linear dichroism (LD) in x-ray absorption, diffraction, transport, and magnetization measurements on
thin La0.7Sr0.3MnO3 films grown on different substrates, allow identification of a peculiar interface effect, related just to the presence of the interface. We report the LD signature of preferential 3d - eg(3z2 - r2 occupation at the interface, suppressing the double exchange mechanism. This surface orbital reconstruction is opposite to that favored by residual strain and is independent of dipolar fields, the chemical nature of the substrate and the presence of capping layers.

Original languageEnglish
Article number137401
JournalPhysical Review Letters
Volume100
Number of pages4
ISSN0031-9007
DOIs
Publication statusPublished - 2008
Externally publishedYes

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