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

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

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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.

Original language	English
Pages (from-to)	9128-9131
Number of pages	4
Journal	Physical Review B
Volume	46
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.46.9128
State	Published - 1992
Externally published	Yes

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title = "Low-energy incommensurate spin excitations in superconducting La1.85Sr0.15CuO4",

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.",

author = "Thurston, {T. R.} and Gehring, {P. M.} and G. Shirane and Birgeneau, {R. J.} and Kastner, {M. A.} and Y. Endoh and M. Matsuda and K. Yamada and H. Kojima and I. Tanaka",

year = "1992",

doi = "10.1103/PhysRevB.46.9128",

language = "English",

volume = "46",

pages = "9128--9131",

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T1 - Low-energy incommensurate spin excitations in superconducting La1.85Sr0.15CuO4

AU - Thurston, T. R.

AU - Gehring, P. M.

AU - Shirane, G.

AU - Birgeneau, R. J.

AU - Kastner, M. A.

AU - Endoh, Y.

AU - Matsuda, M.

AU - Yamada, K.

AU - Kojima, H.

AU - Tanaka, I.

PY - 1992

Y1 - 1992

N2 - 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.

AB - 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.

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DO - 10.1103/PhysRevB.46.9128

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VL - 46

SP - 9128

EP - 9131

JO - Physical Review B

JF - Physical Review B

IS - 14

ER -

Low-energy incommensurate spin excitations in superconducting La1.85Sr0.15CuO4

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