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

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

doi:10.1103/PhysRevLett.71.919

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 journal › Journal article › Research

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 language	English
Journal	Physical Review Letters
Volume	71
Issue number	6
Pages (from-to)	919-922
ISSN	0031-9007
DOIs	https://doi.org/10.1103/PhysRevLett.71.919
Publication status	Published - 1993

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title = "Low energy excitations in superconducting La1.86Sr0.14CuO4",

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. ",

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AU - Mason, T.E.

AU - Aeppli, G.

AU - Hayden, S.M.

AU - Ramirez, A.P.

AU - Mook, H.A.

PY - 1993

Y1 - 1993

N2 - 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.

AB - 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.

KW - Materialer med særlige fysiske og kemiske egenskaber

U2 - 10.1103/PhysRevLett.71.919

DO - 10.1103/PhysRevLett.71.919

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