Renormalization Group Approach to Strong-Coupled Superconductors

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dc.creatorTsai, S. -W.
dc.creatorNeto, A. H. Castro
dc.creatorShankar, R.
dc.creatorCampbell, D. K.
dc.date2004-06-07
dc.date2005-10-04
dc.date.accessioned2026-07-07T06:20:42Z
dc.date.available2026-07-07T06:20:42Z
dc.descriptionWe develop an asymptotically exact renormalization group (RG) approach that treats electron-electron and electron-phonon interactions on equal footing. The approach allows an unbiased study of the instabilities of Fermi liquids without the assumption of a broken symmetry. We apply our method to the problem of strongly coupled superconductors and find the temperature T* below which the high-temperature Fermi liquid state becomes unstable towards Cooper pairing. We show that T* is the same as the critical temperature Tc obtained in Eliashberg's strong coupling theory starting from the low-temperature superconducting phase. We also show that Migdal's theorem is implicit in our approach. Finally, our results lead to a novel way to calculate numerically, from microscopic parameters, the transition temperature of superconductors.
dc.description6 pages, 3 figures, expanded presentation, final version
dc.identifierhttps://arxiv.org/abs/cond-mat/0406174
dc.identifierhttp://arxiv.org/abs/cond-mat/0406174
dc.identifierPhys. Rev. B 72, 054531 (2005)
dc.identifierdoi:10.1103/PhysRevB.72.054531
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/95388
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleRenormalization Group Approach to Strong-Coupled Superconductors
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