Evidence of orbital reconstruction at interfaces in La0.67Sr0.33MnO3 films

Abstract

Electronic properties of transition metal oxides at interfaces are influenced by strain, electric polarization and oxygen diffusion. Linear dichroism (LD) x-ray absorption, diffraction, transport and magnetization on thin La0.7Sr0.3MnO3 films, allow identification of a peculiar universal interface effect. 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 of that favored by residual strain and independent of dipolar fields, chemical nature of the substrate and capping.

13 pages, 5 figures

References in corpus (3)

• Magnetic effects at the interface between nonmagnetic oxides
• Proximity effects induced by a gold layer on La0.67Sr0.33MnO3 thin films
• Magnetic order and valency at La${}_{0.7}$Sr${}_{0.3}$MnO${}_3$/SrTiO${}_3$ interfaces

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