High energy spin excitations in BaFe2As2

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dc.creatorEwings, R. A.
dc.creatorPerring, T. G.
dc.creatorBewley, R. I.
dc.creatorGuidi, T.
dc.creatorPitcher, M. J.
dc.creatorParker, D. R.
dc.creatorClarke, S. J.
dc.creatorBoothroyd, A. T.
dc.date2008-08-21
dc.date2008-10-20
dc.date.accessioned2026-07-07T12:09:35Z
dc.date.available2026-07-07T12:09:35Z
dc.descriptionWe report neutron scattering measurements of cooperative spin excitations in antiferromagnetically ordered BaFe2As2, the parent phase of an iron pnictide superconductor. The data extend up to ~100meV and show that the spin excitation spectrum is sharp and highly dispersive. By fitting the spectrum to a linear spin-wave model we estimate the magnon bandwidth to be in the region of 0.17eV. The large characteristic spin fluctuation energy suggests that magnetism could play a role in the formation of the superconducting state.
dc.description4 pages, 4 figures; v2: minor changes to the text and abstract and more general expressions for the linear spin-wave cross section included
dc.identifierhttps://arxiv.org/abs/0808.2836
dc.identifierhttp://arxiv.org/abs/0808.2836
dc.identifierPhys. Rev. B 78, 220501(R) (2008)
dc.identifierdoi:10.1103/PhysRevB.78.220501
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/209673
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleHigh energy spin excitations in BaFe2As2
dc.typetext

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