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Participation of carbon in the electronic structure of YBa sub 2 Cu sub 3 O sub 7 minus. delta
Journal article

Participation of carbon in the electronic structure of YBa sub 2 Cu sub 3 O sub 7 minus. delta

P.E Batson, T.M Shaw, D Dimos and P.R Duncombe
Physical review. B, Condensed matter, Vol.43:7
03/01/1991
DOI: https://doi.org/10.1103/PhysRevB.43.6236

Abstract

360204 - Ceramics, Cermets, & Refractories- Physical Properties ALKALINE EARTH METAL COMPOUNDS ALLOYS BARIUM COMPOUNDS BARIUM OXIDES CARBON ADDITIONS CHALCOGENIDES COPPER COMPOUNDS COPPER OXIDES CRYSTALS ELECTRON SPECTROSCOPY ELECTRONIC STRUCTURE ENERGY-LOSS SPECTROSCOPY IMPURITIES MATERIALS SCIENCE MONOCRYSTALS OXIDES OXYGEN COMPOUNDS SPECTROSCOPY TRANSITION ELEMENT COMPOUNDS YTTRIUM COMPOUNDS YTTRIUM OXIDES
Electron-energy-loss measurements in 2-nm-sized regions of single-crystal YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} show about 0.5 wt. % carbon dissolved in the matrix. The energy-loss near-edge fine structure (ELNES) at the carbon 1{ital s} absorption edge favors an environment similar to BaCO{sub 3}. The carbon ELNES is correlated with the oxygen 1{ital s} ELNES in a way that suggests that carbon-derived orbitals participate in the electronic structure within 1 eV of the Fermi level.

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