Temperature dependence of the magnetic penetration depth in the high-Tc superconductor Ba2YCu3O9−δ: Evidence for conventional s-wave pairing
D. R. Harshman, G. Aeppli, E. J. Ansaldo, B. Batlogg, J. H. Brewer, J. F. Carolan, R. J. Cava, M. Celio, A. C. D. Chaklader, W. N. Hardy, S. R. Kreitzman, G. M. Luke, D. R. Noakes, M. Senba
DOI 10.1103/PhysRevB.36.2386 · Physical Review B
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Abstract
Transverse-field muon-spin-relaxation (μSR) measurements have been performed on Ba2YCu3O9−δ (δ=2.1±0.05) above and below its superconducting transition temperature. The temperature dependence of the magnetic penetration depth, deduced from the μSR data, is that of an ordinary s-wave (not d-wave with nodes in the gap function) superconductor. The data at 6 K indicate a magnetic penetration depth of λ≈1400 Å which, in the limit of extreme anisotropy, reduces to λ≈1065 Å.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba2YCu3O9-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure not reported | midpoint |
| Ba2YCu3O9-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | onset |
| La1.85Sr0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Y1.2Ba0.8CuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | unknown |
| Nb3Ge Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| UBe13 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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