Vortex-Pair Excitation near the Superconducting Transition of Bi2Sr2CaCu2O8 Crystals
S. Martin, A. T. Fiory, R. M. Fleming, G. P. Espinosa, A. S. Cooper
DOI 10.1103/PhysRevLett.62.677 · Physical Review Letters
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Abstract
The dissipation observed at the superconducting transition of the high-Tc superconductor Bi2Sr2CaCu2O8 is explained quantitatively by the Kosterlitz-Thouless theory of vortex-antivortex pair excitations within the CuO2 planes. This conclusion is drawn from the observation of an exponential square-root singularity in the resistivity and a power-law dependence of the resistivity on magnetic field. The Kosterlitz-Thouless phase transition (Tc=84.7 K) is at the ρ=0 point, and the mean-field Ginzburg-Landau transition (Tc0=86.8 K) at ∼25% of the normal-state resistivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 84.7 | Pressure not reported | zero_resistance |
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 86.8 | Pressure not reported | onset |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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