Charge carrier distribution in Y sub(1-z)Ca sub(z)Ba sub(2)Cu sub(3)O sub(x)

We have performed polarized reflection measurements on the (001) plane of various single domain crystals of Y sub(1-z)Ca sub(z)Ba sub(2)Cu sub(3)O sub(x) with different Ca and oxygen content. Using the in-plane anisotropy of the optical properties, we could separate the contribution of the Cu-O laye...

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Published in:Physica. C, Superconductivity Superconductivity, 1996-01, Vol.267 (3-4), p.254-260
Main Authors: Widder, K, Berner, D, Muenzel, J, Geserich, H P, Klaeser, M, Mueller-Vogt, G, Wolf, Th
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container_issue 3-4
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container_title Physica. C, Superconductivity
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creator Widder, K
Berner, D
Muenzel, J
Geserich, H P
Klaeser, M
Mueller-Vogt, G
Wolf, Th
description We have performed polarized reflection measurements on the (001) plane of various single domain crystals of Y sub(1-z)Ca sub(z)Ba sub(2)Cu sub(3)O sub(x) with different Ca and oxygen content. Using the in-plane anisotropy of the optical properties, we could separate the contribution of the Cu-O layers and the Cu-O chains to the electronic transport properties. It was found that the additional carriers introduced as a result of the Ca doping only appear in the Cu-O layers, while the doping of the chains is even reduced because of an increase of oxygen vacancies with increasing Ca doping for samples with an oxygen content close to seven. The superconducting transition temperature T sub(c) could be correlated with the free carrier concentration in the Cu-O layers, indicating a comparable phenomenon of overdoping in the 1-2-3 compound as it has been found in other high T sub(c) cuprates.
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title Charge carrier distribution in Y sub(1-z)Ca sub(z)Ba sub(2)Cu sub(3)O sub(x)
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