Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2009-07-15
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 5 figures, submitted to PRB
Scientific paper
The interfacial properties of Y0.6Pr0.4Ba2Cu3O7/La2/3Ca1/3MnO3 superlattices have been studied by resonant soft x-rays and diffuse scattered neutrons. Linearly polarized X-ray absorption at Cu L3 -edge reveals dramatic interfacial changes from the bulk including charge transfer between LCMO and YPBCO and an orbital reconstruction in the interface CuO2 plane. The similarities to the case of zero Pr-doping are due to the strongly hybridized covalent bond between Cu and Mn. However, reduced charge transfer and a more bulk-like interfacial orbital occupation are observed and related to the effect of Pr-doping. Neutron reflectometry measurements reveal a drastic increase in diffuse scattering with decreasing temperature, likely due to buckling caused by the structural phase transition of the SrTiO3 substrate. We observe no evidence that this diffuse scattering is related to the superconducting transition.
Chakhalian Jacques
Cristiani G.
Freeland John W.
Habermeier Hanns-Ulrich
Kareev M.
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