Fluctuation Effect in the π-flux State for Undoped High-Temperature Superconductors

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dc.creatorMorinari, T.
dc.date2008-04-22
dc.date2008-12-03
dc.date.accessioned2026-07-07T12:08:28Z
dc.date.available2026-07-07T12:08:28Z
dc.descriptionThe effect of fluctuations about the pi-flux mean field state for the undoped high-temperature superconductors is investigated. It is shown that fluctuations of the mean fields lead to a self-energy correction that doubles the band width of the fermion dispersion in the lowest order. The dynamical mass generation is associated with the self-energy effect due to the interaction mediated by the Lagrange multiplier field, which is introduced to impose the constraint on the fermions. A self-consistent picture about the mass generation and the prop- agation of the Lagrange multiplier field without damping is proposed. The antiferromagnetic long-range ordering is described without introducing an additional repulsive interaction. The theory suggests a natural framework to study spin disordered systems in which fermionic excitations are low-lying excitations.
dc.description20 pages, 7 figures, title changed, added an appendix and figures
dc.identifierhttps://arxiv.org/abs/0804.3435
dc.identifierhttp://arxiv.org/abs/0804.3435
dc.identifierJ. Phys. Soc. Jpn. 77 (2008) 114708
dc.identifierdoi:10.1143/JPSJ.77.114708
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/209330
dc.subjectStrongly Correlated Electrons
dc.titleFluctuation Effect in the π-flux State for Undoped High-Temperature Superconductors
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