Normal-state conductivity between CuO2 planes in copper oxide superconductors View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1991-04

AUTHORS

T. Ito, H. Takagi, S. Ishibashi, T. Ido, S. Uchida

ABSTRACT

THE high-transition-temperature (high- T c) copper oxide superconductors are highly anisotropic in their electrical properties; this is one of the key concerns for applications of these materials, and may also provide a clue to the mechanism of the superconductivity. Although the resistivity in the CuO2 planes, ρ ab , shows a metallic temperature dependence, the resistivity parallel to the c axis (ρ c ) has been reported to be both non-metallic1,2 and metallic3,4. Here we present systematic data for ρ c in a number of high-T c materials, obtained from well characterized single crystals. Both the magnitude and the temperature dependence of ρ c are strongly dependent on crystal structure, and on the concentration of charge carriers. We find that ρ c is non-metallic (dρ c /dT< 0) in most superconducting compounds, suggesting an unconventional conduction mechanism. Fully oxygenated YBa2Cu3O∼7 (with T c≈90K) is the only exception, with a relatively small ρ c and positive dρ c /d T that may arise from the crystal structure specific to this material. More... »

PAGES

596-598

Journal

TITLE

Nature

ISSUE

6319

VOLUME

350

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/350596a0

DOI

http://dx.doi.org/10.1038/350596a0

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1004027958


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