Enhanced pairing interaction in a two-band model

O. Entin-Wohlman*, Y. Imry

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


The Kondo picture for the electron-electron attraction due to transfer of pairs of electrons between two bands is investigated. This interaction may reduce the Coulomb repulsion considerably, leading to enhancement of the superconducting transition temperature and a substantial weakening of the isotope effect. The special screening effect is large when the empty band is narrow and the energy gap between the two bands is small. Possible relevance to the superconducting oxides is suggested.

Original languageEnglish
Article number027
Pages (from-to)9045-9049
Number of pages5
JournalJournal of Physics Condensed Matter
Issue number45
StatePublished - 1989


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