Exchange-driven pairing of delocalized carriers in high-temperature superconductors

Ellen Stechel, D. R. Jennison

Research output: Contribution to journalArticle

4 Citations (Scopus)

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 languageEnglish (US)
Pages (from-to)6919-6930
Number of pages12
JournalPhysical Review B
Volume40
Issue number10
DOIs
StatePublished - 1989
Externally publishedYes

Fingerprint

Hamiltonians
High temperature superconductors
Superconductivity
high temperature superconductors
Carrier concentration
Screening
Ions
Oxygen
Temperature
oxygen ions
sublattices
attraction
screening
superconductivity
interactions
configurations

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 journalArticle

@article{034fc6dc2de64b81821e930723e7a579,
title = "Exchange-driven pairing of delocalized carriers in high-temperature superconductors",
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.",
author = "Ellen Stechel and Jennison, {D. R.}",
year = "1989",
doi = "10.1103/PhysRevB.40.6919",
language = "English (US)",
volume = "40",
pages = "6919--6930",
journal = "Physical Review B-Condensed Matter",
issn = "0163-1829",
publisher = "American Institute of Physics Publising LLC",
number = "10",

}

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.

UR - http://www.scopus.com/inward/record.url?scp=35949012122&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=35949012122&partnerID=8YFLogxK

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 - 0163-1829

IS - 10

ER -