Spin Fluctuations in Sr 2 RuO 4 from Polarized Neutron Scattering: Implications for Superconductivity

P. Steffens, Y. Sidis, J. Kulda, Z.Q. Mao, Y. Maeno, I.I. Mazin, M. Braden

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Triplet pairing in Sr2RuO4 was initially suggested based on the hypothesis of strong ferromagnetic spin fluctuations. Using polarized inelastic neutron scattering, we accurately determine the full spectrum of spin fluctuations in Sr2RuO4. Besides the well-studied incommensurate magnetic fluctuations, we do find a sizable quasiferromagnetic signal, quantitatively consistent with all macroscopic and microscopic probes. We use this result to address the possibility of magnetically driven triplet superconductivity in Sr2RuO4. We conclude that, even though the quasiferromagnetic signal is stronger and sharper than previously anticipated, spin fluctuations alone are not enough to generate a triplet state strengthening the need for additional interactions or an alternative pairing scenario. \ 2019 American Physical Society.
Original languageEnglish
JournalPhysical Review Letters
Volume122
Issue number4
DOIs
StatePublished - 2019

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neutron scattering
superconductivity
atomic energy levels
inelastic scattering
probes
interactions

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Steffens, P. ; Sidis, Y. ; Kulda, J. ; Mao, Z.Q. ; Maeno, Y. ; Mazin, I.I. ; Braden, M. / Spin Fluctuations in Sr 2 RuO 4 from Polarized Neutron Scattering: Implications for Superconductivity. In: Physical Review Letters. 2019 ; Vol. 122, No. 4.
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abstract = "Triplet pairing in Sr2RuO4 was initially suggested based on the hypothesis of strong ferromagnetic spin fluctuations. Using polarized inelastic neutron scattering, we accurately determine the full spectrum of spin fluctuations in Sr2RuO4. Besides the well-studied incommensurate magnetic fluctuations, we do find a sizable quasiferromagnetic signal, quantitatively consistent with all macroscopic and microscopic probes. We use this result to address the possibility of magnetically driven triplet superconductivity in Sr2RuO4. We conclude that, even though the quasiferromagnetic signal is stronger and sharper than previously anticipated, spin fluctuations alone are not enough to generate a triplet state strengthening the need for additional interactions or an alternative pairing scenario. \ 2019 American Physical Society.",
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Spin Fluctuations in Sr 2 RuO 4 from Polarized Neutron Scattering: Implications for Superconductivity. / Steffens, P.; Sidis, Y.; Kulda, J.; Mao, Z.Q.; Maeno, Y.; Mazin, I.I.; Braden, M.

In: Physical Review Letters, Vol. 122, No. 4, 2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Spin Fluctuations in Sr 2 RuO 4 from Polarized Neutron Scattering: Implications for Superconductivity

AU - Steffens, P.

AU - Sidis, Y.

AU - Kulda, J.

AU - Mao, Z.Q.

AU - Maeno, Y.

AU - Mazin, I.I.

AU - Braden, M.

N1 - cited By 0

PY - 2019

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AB - Triplet pairing in Sr2RuO4 was initially suggested based on the hypothesis of strong ferromagnetic spin fluctuations. Using polarized inelastic neutron scattering, we accurately determine the full spectrum of spin fluctuations in Sr2RuO4. Besides the well-studied incommensurate magnetic fluctuations, we do find a sizable quasiferromagnetic signal, quantitatively consistent with all macroscopic and microscopic probes. We use this result to address the possibility of magnetically driven triplet superconductivity in Sr2RuO4. We conclude that, even though the quasiferromagnetic signal is stronger and sharper than previously anticipated, spin fluctuations alone are not enough to generate a triplet state strengthening the need for additional interactions or an alternative pairing scenario. \ 2019 American Physical Society.

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DO - 10.1103/PhysRevLett.122.047004

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JO - Physical Review Letters

JF - Physical Review Letters

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