Evidence of Orbital Reconstruction at Interfaces in UltrathinLa0.67Sr0.33MnO3Films

A. Tebano, C. Aruta, S. Sanna, P. G. Medaglia, G. Balestrino, A. A. Sidorenko, R. De Renzi, G. Ghiringhelli, L. Braicovich, V. Bisogni, N. B. Brookes
2008 Physical Review Letters  
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
more » ... by residual strain and independent of dipolar fields, chemical nature of the substrate and capping.
doi:10.1103/physrevlett.100.137401 pmid:18517994 fatcat:pkl4rnydcfcqvk2r635uhqgjxm