Low-temperature thermodynamics of one class of flat-band models

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dc.creatorDerzhko, O
dc.creatorRichter, J
dc.creatorHonecker, A
dc.date2009-02-10
dc.date.accessioned2026-07-07T12:42:03Z
dc.date.available2026-07-07T12:42:03Z
dc.descriptionWe consider the antiferromagnetic Heisenberg model and the repulsive Hubbard model for a class of frustrated lattices with a completely dispersionless (flat) lowest one-particle (either one-magnon or one-electron) band. We construct exact many-particle ground states for a wide range of particle densities, calculate their degeneracy, and, as a result, obtain closed-form expressions for the low-temperature thermodynamic quantities around a particular value of the magnetic field $h_{\rm{sat}}$ or the chemical potential $μ_0$. We confirm our analytic findings by numerical data for finite lattices.
dc.description4 pages including 3 PostScript files; to appear in Journal of Physics: Conference Series (proceedings of HFM2008)
dc.identifierhttps://arxiv.org/abs/0902.1627
dc.identifierhttp://arxiv.org/abs/0902.1627
dc.identifierJ. Phys.: Conf. Ser. 145 (2009) 012059
dc.identifierdoi:10.1088/1742-6596/145/1/012059
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/219947
dc.subjectStrongly Correlated Electrons
dc.titleLow-temperature thermodynamics of one class of flat-band models
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