Ferromagnetism in an itinerant electron system: Hubbard model on complete graph

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dc.creatorWang, D. F.
dc.date1996-04-18
dc.date.accessioned2026-07-07T03:08:31Z
dc.date.available2026-07-07T03:08:31Z
dc.descriptionIn this work, the ground states of the Hubbard model on complete graph are studied, for a finite lattice size $L$ and arbitrary on-site energy $U$. We construct explicitly the ground states of the system when the number of the electrons $N_e \ge L+1$. In particular, for $N_e=L+1$, the ground state is ferromagnetic with total spin $s_g=(N_e-2)/2$.
dc.description8 pages, Latex, preprint of ETH-Lausanne
dc.identifierhttps://arxiv.org/abs/cond-mat/9604121
dc.identifierhttp://arxiv.org/abs/cond-mat/9604121
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/27525
dc.subjectCondensed Matter
dc.titleFerromagnetism in an itinerant electron system: Hubbard model on complete graph
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