Crossover in temperature dependence of penetration depth λ(T) in superconducting YBa2Cu3O7−δ films
Ju Young Lee, Kathleen M. Paget, Thomas R. Lemberger, Steve R. Foltyn, Xindi Wu
DOI 10.1103/PhysRevB.50.3337 · Physical Review B
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Abstract
The ab-plane penetration depth λ(T) in twinned YBa2Cu3O7−δ films exhibits a crossover in its T dependence at 25 K. Below 25 K, δλ≡λ(T)-λ(0)∝T2. This differs from recent measurements on a crystal which find δλ∝T below 40 K. Above 25 K, the normalized data λ(T/Tc)/λ(0) vs T/Tc for our films agree extremely well with the crystal data, including quasilinear behavior between 25 and 40 K. Differences and similarities of films and crystals agree well with a theory of slightly disordered d-wave superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 87.5 | Pressure not reported | unknown |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 88.3 | Pressure not reported | unknown |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 86.7 | Pressure not reported | unknown |
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