Band renormalization and Fermi surface reconstruction in iron-based superconductors

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dc.creatorYu, Shun-Li
dc.creatorKang, Jing
dc.creatorLi, Jian-Xin
dc.date2009-01-07
dc.date.accessioned2026-07-07T12:42:48Z
dc.date.available2026-07-07T12:42:48Z
dc.descriptionUsing the fluctuation exchange approximation and a three-orbital model, we study the band renormalization, Fermi surface reconstruction and the superconducting pairing symmetry in the newly-discovered iron-based superconductors. We find that the inter-orbital spin fluctuations lead to the strong anisotropic band renormalization and the renormalization is orbital dependent. As a result, the topology of Fermi surface displays distinct variation with doping from the electron type to the hole type, which is consistent with the recent experiments. This shows that the Coulomb interactions will have a strong effect on the band renormalization and the topology of the electron Fermi pocket. In addition, the pairing state mediated by the inter-orbital spin fluctuation is of an extended s-wave symmetry.
dc.description16 pages, 6 figures
dc.identifierhttps://arxiv.org/abs/0901.0821
dc.identifierhttp://arxiv.org/abs/0901.0821
dc.identifierPhys. Rev. B 79, 064517 (2009)
dc.identifierdoi:10.1103/PhysRevB.79.064517
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/220202
dc.subjectSuperconductivity
dc.titleBand renormalization and Fermi surface reconstruction in iron-based superconductors
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