Inelastic neutron scattering study of magnetic excitations in Sr2RuO4

Markus Braden, Y. Sidis, P. Bourges, P. Pfeuty, J. Kulda, Z. Mao, Y. Maeno

Research output: Contribution to journalArticle

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Abstract

Magnetic excitations in Sr2RuO4 have been studied by inelastic neutron scattering. The magnetic fluctuations are dominated by incommensurate peaks related to the Fermi surface nesting of the quasi-one-dimensional dxz and dyz bands. The shape of the incommensurate signal agrees well with random phase approximation calculations. At the incommensurate Q positions the energy spectrum considerably softens upon cooling, pointing to a close magnetic instability: Sr2RuO4 does not exhibit quantum criticality but is very close to it. ω/T scaling may be fitted to the data for temperatures above 30 K. Below the superconducting transition, the magnetic response at the nesting signal is not found to change in the energy range down to 0.4 meV.

Original languageEnglish (US)
Article number064522
Pages (from-to)645221-6452211
Number of pages5806991
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume66
Issue number6
DOIs
StatePublished - Aug 1 2002

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Inelastic neutron scattering
Fermi surface
inelastic scattering
neutron scattering
Cooling
excitation
Fermi surfaces
energy spectra
cooling
scaling
Temperature
approximation
temperature
energy

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Braden, Markus ; Sidis, Y. ; Bourges, P. ; Pfeuty, P. ; Kulda, J. ; Mao, Z. ; Maeno, Y. / Inelastic neutron scattering study of magnetic excitations in Sr2RuO4 In: Physical Review B - Condensed Matter and Materials Physics. 2002 ; Vol. 66, No. 6. pp. 645221-6452211.
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Inelastic neutron scattering study of magnetic excitations in Sr2RuO4 . / Braden, Markus; Sidis, Y.; Bourges, P.; Pfeuty, P.; Kulda, J.; Mao, Z.; Maeno, Y.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 66, No. 6, 064522, 01.08.2002, p. 645221-6452211.

Research output: Contribution to journalArticle

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T1 - Inelastic neutron scattering study of magnetic excitations in Sr2RuO4

AU - Braden, Markus

AU - Sidis, Y.

AU - Bourges, P.

AU - Pfeuty, P.

AU - Kulda, J.

AU - Mao, Z.

AU - Maeno, Y.

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AB - Magnetic excitations in Sr2RuO4 have been studied by inelastic neutron scattering. The magnetic fluctuations are dominated by incommensurate peaks related to the Fermi surface nesting of the quasi-one-dimensional dxz and dyz bands. The shape of the incommensurate signal agrees well with random phase approximation calculations. At the incommensurate Q positions the energy spectrum considerably softens upon cooling, pointing to a close magnetic instability: Sr2RuO4 does not exhibit quantum criticality but is very close to it. ω/T scaling may be fitted to the data for temperatures above 30 K. Below the superconducting transition, the magnetic response at the nesting signal is not found to change in the energy range down to 0.4 meV.

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