Exact low-temperature properties of a class of highly frustrated Hubbard models

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dc.creatorDerzhko, Oleg
dc.creatorHonecker, Andreas
dc.creatorRichter, Johannes
dc.date2008-07-18
dc.date2009-01-31
dc.date.accessioned2026-07-07T12:38:25Z
dc.date.available2026-07-07T12:38:25Z
dc.descriptionWe study the repulsive Hubbard model both analytically and numerically on a family of highly frustrated lattices which have one-electron states localized on isolated trapping cells. We construct and count exact many-electron ground states for a wide range of electron densities and obtain closed-form expressions for the low-temperature thermodynamic quantities. Furthermore, we find that saturated ferromagnetism is obtained only for sufficiently high electron densities and large Hubbard repulsion $U$ while there is no finite average moment in the ground states at lower densities.
dc.description8 pages, 7 figures, accepted for publication in Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/0807.2991
dc.identifierhttp://arxiv.org/abs/0807.2991
dc.identifierPhys. Rev. B 79, 054403 (2009)
dc.identifierdoi:10.1103/PhysRevB.79.054403
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/218752
dc.subjectStrongly Correlated Electrons
dc.titleExact low-temperature properties of a class of highly frustrated Hubbard models
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