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 |
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ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Exchange-driven pairing of delocalized carriers in high-temperature superconductors. / Stechel, Ellen; Jennison, D. R.
In: Physical Review B, Vol. 40, No. 10, 1989, p. 6919-6930.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Exchange-driven pairing of delocalized carriers in high-temperature superconductors
AU - Stechel, Ellen
AU - Jennison, D. R.
PY - 1989
Y1 - 1989
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.40.6919
DO - 10.1103/PhysRevB.40.6919
M3 - Article
VL - 40
SP - 6919
EP - 6930
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 10
ER -