Renormalization of the Mean-Field Superconducting Penetration Depth in Epitaxial YBa2Cu3O7 Films
A. T. Fiory, A. F. Hebard, P. M. Mankiewich, R. E. Howard
DOI 10.1103/PhysRevLett.61.1419 · Physical Review Letters
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Abstract
The a−b-plane penetration depth λ(T) in YBa2Cu3O7 films, determined from kinetic inductance measurements, follows the temperature dependence of weak-coupling mean-field BCS theory near Tc to within ∼0.5 K of Tc, resolution limited either by homogeneity or for the thinnest films by phase fluctuations. The Kosterliz-Thouless transition in a thin film is the first observation in a clean type-II superconductor, noted by the universal superfluid jump and the algebraic-decay law with a square-root cusp exponent.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 89.5 | Pressure not reported | unknown |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 91 | Pressure not reported | unknown |
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