Low-energy incommensurate spin excitations in superconducting La1.85Sr0.15CuO4
T. R. Thurston, P. M. Gehring, G. Shirane, R. J. Birgeneau, M. A. Kastner, Y. Endoh, M. Matsuda, K. Yamada, H. Kojima, I. Tanaka
DOI 10.1103/PhysRevB.46.9128 · Physical Review B
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Abstract
Neutron-scattering experiments with markedly improved signal-to-noise ratios have been performed on single-crystal superconducting La1.85Sr0.15CuO4 (Tc=33 K) at energies down to 1.5 meV. The measurements provide quantitative information on the temperature dependence of χ’’(q,ω). Surprisingly, χ’’(qpeak,ω) is approximately constant below Tc for the measured energies 1.5 meV≤ω≤6 meV, that is, for energies much less than the mean-field BCS gap energy of ∼10 meV, hence implying other than conventional s-wave superconductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La1.85Sr0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 33 | Pressure not reported | unknown |
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