Spin wave dispersion softening in the ferromagnetic Kondo lattice model for manganites

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dc.creatorMancini, F.
dc.creatorPerkins, N. B.
dc.creatorPlakida, N. M.
dc.date2000-11-28
dc.date.accessioned2026-07-07T02:39:35Z
dc.date.available2026-07-07T02:39:35Z
dc.descriptionSpin dynamics is calculated in the ferromagnetic (FM) state of the generalized Kondo lattice model taking into account strong on-site correlations between e_g electrons and antiferromagnetic (AFM) exchange among t_{2g} spins. Our study suggests that competing FM double-exchange and AFM super-exchange interaction lead to a rather nontrivial spin-wave spectrum. While spin excitations have a conventional Dq^2 spectrum in the long-wavelength limit, there is a strong deviation from the spin-wave spectrum of the isotropic Heisenberg model close to the zone boundary. The relevance of our results to the experimental data are discussed.
dc.description6 RevTex pages, 3 embedded PostScript figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0011464
dc.identifierhttp://arxiv.org/abs/cond-mat/0011464
dc.identifierPhys. Lett. A 284, 286 (2001)
dc.identifierdoi:10.1016/S0375-9601(01)00321-8
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/17068
dc.subjectStrongly Correlated Electrons
dc.titleSpin wave dispersion softening in the ferromagnetic Kondo lattice model for manganites
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