The Double Exchange Model at Low Densities

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dc.creatorPereira, Vitor M.
dc.creatorSantos, J. M. B. Lopes dos
dc.creatorNeto, A. H. Castro
dc.date2005-05-30
dc.date.accessioned2026-07-07T03:05:25Z
dc.date.available2026-07-07T03:05:25Z
dc.descriptionWe obtain the phase diagram of the double-exchange model at low electronic densities in the presence of electron-electron interactions. The single particle problem and its extension to low electronic densities, when a Wigner crystal of magnetic polarons is generated due to unscreened Coulomb interactions, is studied. It is argued that the Wigner crystal is the natural alternative to phase separation when the Coulomb interaction is taken into account. We discuss the thermal and quantum stability of the crystalline phase towards a polaronic Fermi liquid and a homogeneous, metallic, ferromagnetic phase. The relevance and application of our results to EuB_6 is also considered.
dc.description4 pages, 2 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0505741
dc.identifierhttp://arxiv.org/abs/cond-mat/0505741
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/26439
dc.subjectStrongly Correlated Electrons
dc.titleThe Double Exchange Model at Low Densities
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