Spin fluctuation effects in the normal state of Hubbard systems

J. Costa-Quintana, F. López-Aguilar, A. Pérez-Navarro, L. Puig-Puig

Research output: Contribution to journalArticleResearchpeer-review

7 Citations (Scopus)


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 considered effective potentials are found from spin fluctuations within a Hubbard single band model. We find that the self-energy tends to violate the Luttinger theorem as the bandwidths are narrowed and also as the Hubbard U increases. This is an indication that a new fundamental state should be used to describe the system under these conditions. We have used an antiferromagnetic fundamental state and found that in this case the new self-energy does satisfy the Luttinger theorem.
Original languageEnglish
Pages (from-to)929-931
JournalPhysica B: Condensed Matter
Publication statusPublished - 1 Jan 1997


  • High temperature superconductivity
  • Hubbard model
  • Luttinger theorem
  • Spin fluctuations
  • Superconductivity


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