Spin fluctuation effects in normal and s-superconducting states in Hubbard systems

L. Puig-Puig, F. López-Aguilar

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    We obtain and discuss the self-energy and the renormalized electronic structure of the normal state in strongly correlated electron systems within the pseudogap regime. The effective potentials considered are found from spin fluctuations within a three-dimensional Hubbard single band model. Vertex effects are included and discussed within this formalism. We find that the self-energy tends to violate the Luttinger theorem when the bandwidths are narrowed. We note that when the bands are further narrowed, the corresponding Eliashberg-like equations tend to yield superconductivity.
    Original languageEnglish
    Pages (from-to)471-481
    JournalPhysica Status Solidi (B) Basic Research
    Volume201
    Issue number2
    DOIs
    Publication statusPublished - 1 Jan 1997

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