Thermodynamic fluctuations in the superconductor Y1Ba2Cu3O9−y: Evidence for two-dimensional superconductivity
M. Ausloos, Ch. Laurent
DOI 10.1103/PhysRevB.37.611 · Physical Review B
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Abstract
The electrical resistance and the magnetoresistance of the ceramic superconductor Y1Ba2Cu3O9−y have been precisely measured in order to extract the temperature derivative and to analyze the fluctuation regimes. The logarithmic dependence at high temperature is followed near the transition by a two-dimensional fluctuation regime in agreement with Aslamazov-Larkin theory (critical exponent λ2D=1, and a complex behavior below Tc. Our findings disprove the observation of a three-dimensional fluctuation regime near and above Tc.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Y1Ba2Cu3O9-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90.51 | Pressure not reported | midpoint |
| Y1Ba2Cu3O9-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90.25 | Pressure not reported | midpoint |
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