Superconducting energy gap in MBa2Cu3O7−δ-type materials
A. Wittlin, L. Genzel, M. Cardona, M. Bauer, W. König, E. García, M. Barahona, M. V. Cabañas
DOI 10.1103/PhysRevB.37.652 · Physical Review B
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Abstract
We present a far-infrared study of ceramic superconductors of the MBa2Cu3O7 family with M=Dy, Sm0.5Ho0.5, and Sm0.5Y0.5. Emphasis is placed on the determination of the position of the superconducting energy gap Eg and its temperature dependence. We find that for all compositions studied EgkBTc≈3.2±0.3. We also find indications of the temperature dependence of the gap and discuss the influence of the phonon features on the quantitative determination of the gap position.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| DyBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | midpoint |
| Sm0.5Ho0.5Ba2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | midpoint |
| Sm0.5Y0.5Ba2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | midpoint |
| La1-xSrxCu2O4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YBa2Cu3O7-δ 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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