Itinerant magnetic excitations in antiferromagnetic CaFe2As2

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dc.creatorDiallo, S. O.
dc.creatorAntropov, V. P.
dc.creatorPerring, T. G.
dc.creatorBroholm, C.
dc.creatorPulikkotil, J. J.
dc.creatorNi, N.
dc.creatorBud'ko, S. L.
dc.creatorCanfield, P. C.
dc.creatorKreyssig, A.
dc.creatorGoldman, A. I.
dc.creatorMcQueeney, R. J.
dc.date2009-01-23
dc.date2009-05-08
dc.date.accessioned2026-07-07T13:12:29Z
dc.date.available2026-07-07T13:12:29Z
dc.descriptionNeutron scattering measurements of the magnetic excitations in single crystals of antiferromagnetic CaFe2As2 reveal steeply dispersive and well-defined spin waves up to an energy of 100 meV. Magnetic excitations above 100 meV and up to the maximum energy of 200 meV are however broader in energy and momentum than the experimental resolution. While the low energy modes can be fit to a Heisenberg model, the total spectrum cannot be described as arising from excitations of a local moment system. Ab-initio calculations of the dynamic magnetic susceptibility suggest that the high energy behavior is dominated by the damping of spin waves by particle-hole excitations.
dc.description4 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/0901.3784
dc.identifierhttp://arxiv.org/abs/0901.3784
dc.identifierdoi:10.1103/PhysRevLett.102.187206
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/229592
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleItinerant magnetic excitations in antiferromagnetic CaFe2As2
dc.typetext

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