Kinetic ferromagnetism on a kagome lattice

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dc.creatorPollmann, F.
dc.creatorFulde, P.
dc.creatorShtengel, K.
dc.date2007-05-27
dc.date2008-02-20
dc.date.accessioned2026-07-07T09:44:53Z
dc.date.available2026-07-07T09:44:53Z
dc.descriptionWe study strongly correlated electrons on a kagome lattice at 1/6 and 1/3 filling. They are described by an extended Hubbard Hamiltonian. We are concerned with the limit |t|<<V<<U with hopping amplitude t, nearest-neighbor repulsion V and on-site repulsion U. We derive an effective Hamiltonian and show, with the help of the Perron-Frobenius theorem, that the system is ferromagnetic at low temperatures. The robustness of ferromagnetism is discussed and extensions to other lattices are indicated.
dc.description4 pages, 2 color eps figures; updated version published in Phys. Rev. Lett.; one reference added
dc.identifierhttps://arxiv.org/abs/0705.3941
dc.identifierhttp://arxiv.org/abs/0705.3941
dc.identifierPhys. Rev. Lett. 100, 136404 (2008)
dc.identifierdoi:10.1103/PhysRevLett.100.136404
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/163031
dc.subjectStrongly Correlated Electrons
dc.titleKinetic ferromagnetism on a kagome lattice
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