Correlation-induced suppression of bilayer splitting in high-T c cuprates: A variational cluster approach

Anna M. Fulterer, Enrico Arrigoni

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We carry out a theoretical study of the bilayer single-band Hubbard model in the undoped and in the superconducting phases by means of the variational cluster approach. In particular, we focus on the splitting between the "bonding" and "antibonding" bands induced by the interlayer hopping, as well as its interplay with strong correlation effects. We find that the splitting is considerably suppressed in both the normal and superconducting phases, in qualitative agreement with experiments on Bi 2Sr 2CaCu 2O 8+δ. In addition, in the superconducting phase, the shape of the splitting in k space is modified by correlations.

Original languageEnglish
Pages (from-to)1769-1774
Number of pages6
JournalJournal of superconductivity and novel magnetism
Issue number6
Publication statusPublished - Aug 2012



  • Electronic correlations
  • High-temperature superconductivity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fields of Expertise

  • Advanced Materials Science

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