Absence of a Large Superconductivity-Induced Gap in Magnetic Fluctuations of Sr2RuO4

S. Kunkemöller, P. Steffens, P. Link, Y. Sidis, Z. Q. Mao, Y. Maeno, M. Braden

Research output: Contribution to journalArticle

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Abstract

Inelastic neutron scattering experiments on Sr2RuO4 determine the spectral weight of the nesting induced magnetic fluctuations across the superconducting transition. There is no observable change at the superconducting transition down to an energy of ∼0.35 meV, which is well below the 2Δ values reported in several tunneling experiments. At this and higher energies magnetic fluctuations clearly persist in the superconducting state. Only at energies below ∼0.3 meV can evidence for partial suppression of spectral weight in the superconducting state be observed. This strongly suggests that the one-dimensional bands with the associated nesting fluctuations do not form the active, highly gapped bands in the superconducting pairing in Sr2RuO4.

Original languageEnglish (US)
Article number147002
JournalPhysical Review Letters
Volume118
Issue number14
DOIs
StatePublished - Apr 5 2017

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superconductivity
energy
inelastic scattering
neutron scattering
retarding

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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Kunkemöller, S. ; Steffens, P. ; Link, P. ; Sidis, Y. ; Mao, Z. Q. ; Maeno, Y. ; Braden, M. / Absence of a Large Superconductivity-Induced Gap in Magnetic Fluctuations of Sr2RuO4. In: Physical Review Letters. 2017 ; Vol. 118, No. 14.
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abstract = "Inelastic neutron scattering experiments on Sr2RuO4 determine the spectral weight of the nesting induced magnetic fluctuations across the superconducting transition. There is no observable change at the superconducting transition down to an energy of ∼0.35 meV, which is well below the 2Δ values reported in several tunneling experiments. At this and higher energies magnetic fluctuations clearly persist in the superconducting state. Only at energies below ∼0.3 meV can evidence for partial suppression of spectral weight in the superconducting state be observed. This strongly suggests that the one-dimensional bands with the associated nesting fluctuations do not form the active, highly gapped bands in the superconducting pairing in Sr2RuO4.",
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Kunkemöller, S, Steffens, P, Link, P, Sidis, Y, Mao, ZQ, Maeno, Y & Braden, M 2017, 'Absence of a Large Superconductivity-Induced Gap in Magnetic Fluctuations of Sr2RuO4', Physical Review Letters, vol. 118, no. 14, 147002. https://doi.org/10.1103/PhysRevLett.118.147002

Absence of a Large Superconductivity-Induced Gap in Magnetic Fluctuations of Sr2RuO4. / Kunkemöller, S.; Steffens, P.; Link, P.; Sidis, Y.; Mao, Z. Q.; Maeno, Y.; Braden, M.

In: Physical Review Letters, Vol. 118, No. 14, 147002, 05.04.2017.

Research output: Contribution to journalArticle

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AB - Inelastic neutron scattering experiments on Sr2RuO4 determine the spectral weight of the nesting induced magnetic fluctuations across the superconducting transition. There is no observable change at the superconducting transition down to an energy of ∼0.35 meV, which is well below the 2Δ values reported in several tunneling experiments. At this and higher energies magnetic fluctuations clearly persist in the superconducting state. Only at energies below ∼0.3 meV can evidence for partial suppression of spectral weight in the superconducting state be observed. This strongly suggests that the one-dimensional bands with the associated nesting fluctuations do not form the active, highly gapped bands in the superconducting pairing in Sr2RuO4.

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