From the Hubbard Model to a Systematic Low-Energy Effective Field Theory for Magnons and Holes in an Antiferromagnet

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dc.creatorBrügger, C.
dc.creatorKämpfer, F.
dc.creatorMoser, M.
dc.creatorPepe, M.
dc.creatorWiese, U. -J.
dc.date2006-06-26
dc.date.accessioned2026-07-07T08:35:48Z
dc.date.available2026-07-07T08:35:48Z
dc.descriptionThe low-energy physics of antiferromagnets is governed by their Goldstone bosons -- the magnons -- and it is described by a low-energy effective field theory. In analogy to baryon chiral perturbation theory, we construct the effective field theory for magnons and holes in an antiferromagnet. It is a systematic low-energy expansion based on symmetry considerations and on the fact that the holes are located in pockets centered at k=(pi/2a,\pm pi/2a). Even though the symmetries are extracted from the Hubbard model, the effective theory is universal and makes model-independent predictions about the dynamical mechanisms in the antiferromagnetic phase. The low-energy effective theory has been used to investigate one-magnon exchange which leads to a d-wave-shaped bound state of holes.
dc.description2 pages, Submitted to Physica C, Proceedings of M2S-HTSC 2006 Dresden
dc.identifierhttps://arxiv.org/abs/cond-mat/0606662
dc.identifierhttp://arxiv.org/abs/cond-mat/0606662
dc.identifierPhysica C 460-462 (2007) 1139-1140
dc.identifierdoi:10.1016/j.physc.2007.03.241
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/139864
dc.subjectStrongly Correlated Electrons
dc.titleFrom the Hubbard Model to a Systematic Low-Energy Effective Field Theory for Magnons and Holes in an Antiferromagnet
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