In-plane paraconductivity in a single crystal of superconducting YBa2Cu3O7x

T. A. Friedmann, J. P. Rice, John Giapintzakis, and D. M. Ginsberg
Phys. Rev. B 39, 4258 – Published 1 March 1989
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Abstract

Resistivity measurements have been made in the a-b plane on a single-crystal sample of superconducting YBa2Cu3O7x. The resistivity versus temperature curve shows a highly linear region between 150 and 240 K, with an upward deviation from linearity at 240 K. With decreasing temperature below 150 K, the resistivity curve also deviates from linearity; this deviation has been analyzed in terms of the Aslamazov-Larkin, Lawrence-Doniach, and Maki-Thompson paraconductivity theories. All three theories can be fit to the data, but the Lawrence-Doniach model gives the best fit to the data, with physically reasonable parameters. We find that the Ginzburg-Landau coherence length in the c direction, extrapolated to low temperature with the theoretical temperature dependence, is approximately 0.44 Å.

  • Received 16 November 1988

DOI:https://doi.org/10.1103/PhysRevB.39.4258

©1989 American Physical Society

Authors & Affiliations

T. A. Friedmann, J. P. Rice, John Giapintzakis, and D. M. Ginsberg

  • Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801

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Issue

Vol. 39, Iss. 7 — 1 March 1989

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