Oscillatory gap superconductivity

M. Weger*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

We show that a purely-repulsive potential gives rise to a BCS-like condensed state with a gap function Δ(ε{lunate}) that oscillates with ε{lunate}. This superconducting state has a lower binding energy than the Stoner magnetic state. A small excitonic interaction increases the binding energy of the superconducting state above that of the magnetic state. This superconducting state is stable in the presence of a large Coulomb repulsion. Electron-phonon coupling of moderate strength greatly increases the value of Δ(0). A large variety of experimental properties of the cuprate superconductors are in accord with the predictions of the oscillatory gap model.

Original languageEnglish
Pages (from-to)261-270
Number of pages10
JournalPhysica B: Condensed Matter
Volume172
Issue number1-2
DOIs
StatePublished - 1 Jun 1991

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