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 language | English |
---|---|
Pages (from-to) | 261-270 |
Number of pages | 10 |
Journal | Physica B: Condensed Matter |
Volume | 172 |
Issue number | 1-2 |
DOIs | |
State | Published - 1 Jun 1991 |