Conductivity of anisotropic inhomogeneous superconductors above the critical temperature
S. S. Seidov, K. K. Kesharpu, P. I. Karpov, P. D. Grigoriev
DOI 10.1103/PhysRevB.98.014515 · Physical Review B
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Abstract
We propose a model and derive analytical expressions for conductivity in heterogeneous fully anisotropic conductors with ellipsoid superconducting inclusions. This model and calculations are useful to analyze the observed temperature dependence of conductivity anisotropy in various anisotropic superconductors, where superconductivity onset happens inhomogeneously in the form of isolated superconducting islands. The results are applied to explain the experimental data on resistivity above the transition temperature Tc in the high-temperature superconductor YBa2Cu4O8 and in the organic superconductor β−(BEDT−TTF)2I3. The comparison of resistivity data and diamagnetic response in β−(BEDT−TTF)2I3 allows us to estimate the size of superconducting inclusions as d∼1μm.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 78 | Pressure not reported | unknown |
| β-(BEDT-TTF)2I3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 18 | Pressure not reported | unknown |
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