In-plane paraconductivity in a single crystal of superconducting YBa2Cu3O7−x
T. A. Friedmann, J. P. Rice, John Giapintzakis, D. M. Ginsberg
DOI 10.1103/PhysRevB.39.4258 · Physical Review B
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Abstract
Resistivity measurements have been made in the a-b plane on a single-crystal sample of superconducting YBa2Cu3O7−x. 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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93 | Pressure not reported | zero_resistance |
| YBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 89 | Pressure not reported | midpoint |
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