Abstract
A semiquantitative pairing model is derived from the properties of a realistic Hamiltonian for CuO2 sheets. Due to large interactions between oxygen ions, to first-order delocalized carriers pair via localized spin-system holes on the Cu sublattice. The largest carrier-Cu couplings are dynamic exchange processes involving the Cu(d10) and Cu(d8) configurations. Up to carrier concentrations of 3040 %, exchange-mediated attraction overcomes the large carrier Coulomb repulsion, present because of dielectric local screening. The same mechanism is shown to be capable of explaining high-temperature superconductivity in BiO3. The pairing interaction is attractive for triplet and repulsive for singlet s-wave pairs.
| Original language | English |
|---|---|
| Pages (from-to) | 6919-6930 |
| Number of pages | 12 |
| Journal | Physical Review B |
| Volume | 40 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 1989 |
ASJC Scopus subject areas
- Condensed Matter Physics
Fingerprint Dive into the research topics of 'Exchange-driven pairing of delocalized carriers in high-temperature superconductors'. Together they form a unique fingerprint.
Cite this
Stechel, E., & Jennison, D. R. (1989). Exchange-driven pairing of delocalized carriers in high-temperature superconductors. Physical Review B, 40(10), 6919-6930. https://doi.org/10.1103/PhysRevB.40.6919