Low energy excitations in superconducting La1.86Sr0.14CuO4

T.E. Mason, G. Aeppli, S.M. Hayden, A.P. Ramirez, H.A. Mook

    Research output: Contribution to journalJournal articleResearch

    Abstract

    We present magnetic neutron scattering and specific heat data on the high-T(c) superconductor La1.86Sr0.14CuO4. Even when the samples are superconducting and the magnetic response, chi'', is suppressed, there are excitations with energies well below 3.5k(B)T(c). The wave-vector dependence of chi'' is identical to that for the normal state, which implies that the low frequency excitations in our crystals are not those associated with the nodes of a clean d-wave superconductor. However, the data are consistent with gapless superconductivity induced by localized magnetic impurities, clearly observed in the specific heat measurements.
    Original languageEnglish
    JournalPhysical Review Letters
    Volume71
    Issue number6
    Pages (from-to)919-922
    ISSN0031-9007
    DOIs
    Publication statusPublished - 1993

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