Magnetic properties of spin-orbital polarons in lightly doped cobaltates

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dc.creatorDaghofer, M.
dc.creatorHorsch, P.
dc.creatorKhaliullin, G.
dc.date2006-05-12
dc.date.accessioned2026-07-07T07:08:54Z
dc.date.available2026-07-07T07:08:54Z
dc.descriptionWe present a numerical treatment of a spin-orbital polaron model for Na_xCoO_2 at small hole concentration (0.7 < x < 1). We demonstrate how the polarons account for the peculiar magnetic properties of this layered compound: They explain the large susceptibility; their internal degrees of freedom lead both to a negative Curie-Weiss temperature and yet to a ferromagnetic intra-layer interaction, thereby resolving a puzzling contradiction between these observations. We make specific predictions on the momentum and energy location of excitations resulting from the internal degrees of freedom of the polaron, and discuss their impact on spin-wave damping.
dc.description4+ pages, 6 figures, accepted for publication in Phys. Rev. Lett
dc.identifierhttps://arxiv.org/abs/cond-mat/0605334
dc.identifierhttp://arxiv.org/abs/cond-mat/0605334
dc.identifierPhys. Rev. Lett. 96, 216404 (2006)
dc.identifierdoi:10.1103/PhysRevLett.96.216404
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/110880
dc.subjectStrongly Correlated Electrons
dc.titleMagnetic properties of spin-orbital polarons in lightly doped cobaltates
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