Superconductivity fluctuation effects on the thermal conductivity of Bi2Sr2CaCu2O8
M. Houssa, H. Bougrine, S. Stassen, R. Cloots, M. Ausloos
DOI 10.1103/PhysRevB.54.R6885 · Physical Review B
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Abstract
The superconductivity fluctuation contribution κfl to the thermal conductivity of a Bi2Sr1.8Ca1.2Cu2O8+y polycrystal is extracted from precise experimental data. The crossover from two-dimensional (2D) to 3D behavior theoretically predicted by Varlamov and Livanov is well marked. The crossover temperature TVL and the amplitude of the fluctuation contribution lead to realistic values for the interlayer coupling energy JC and the transport relaxation time τ near Tc.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr1.8Ca1.2Cu2O8+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 79.5 | Pressure not reported | midpoint |
| 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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