Experimental Evidence for Two Gaps in the High-Temperature La1.83Sr0.17CuO4 Superconductor
R. Khasanov, A. Shengelaya, A. Maisuradze, F. La Mattina, A. Bussmann-Holder, H. Keller, K. A. Müller
DOI 10.1103/PhysRevLett.98.057007 · Physical Review Letters
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Abstract
The in-plane magnetic field penetration depth (λab) in single-crystal La1.83Sr0.17CuO4 was investigated by muon-spin rotation (μSR). The temperature dependence of λab−2 has an inflection point around 10–15 K, suggesting the presence of two superconducting gaps: a large gap (Δ1d) with d-wave and a small gap (Δ2s) with s-wave symmetry. The zero-temperature values of the gaps at μ0H=0.02 T were found to be Δ1d(0)=8.2(1) meV and Δ2s(0)=1.57(8) meV.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La1.83Sr0.17CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 36.2 | Pressure not reported | unknown |
| MgB2 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 |
| YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| 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 |
| Pr1.855Ce0.145CuO4 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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