Pairing instabilities of the extended Hubbard model for Cu-O--based superconductors

Journal Article · Mon Dec 04 04:00:00 EST 1989 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.63.2602· OSTI ID:7268725

Littlewood, P B; Varma, C M ^[1]; Abrahams, E ^[2]

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1. AT T Bell Laboratories, Murray Hill, New Jersey 07974 (USA)
2. Serin Physics Laboratory, Rutgers University, Piscataway, New Jersey 08855 (USA)

We use weak-coupling methods to calculate the effective interaction between quasiparticles induced by charge and spin fluctuations in a three-band model for the copper-oxide superconductors with both intersite and intrasite repulsion. The instabilities to superconducting states of different symmetries are calculated; besides the {ital d}-wave superconductivity near the antiferromagnetic instability, we find that extended {ital s}-wave superconductivity is favored by a charge transfer resonance close to a valence instability. A phase diagram similar to experiments is obtained.

• OSTI ID: 7268725
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 63:23; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ANGULAR MOMENTUM
ANTIFERROMAGNETISM
CHALCOGENIDES
CHARGE EXCHANGE
COPPER COMPOUNDS
COPPER OXIDES
COUPLING
D WAVES
EFFECTIVE MASS
ELECTRIC CHARGES
FLUCTUATIONS
FREQUENCY DEPENDENCE
HAMILTONIANS
INSTABILITY
INTERACTIONS
MAGNETISM
MASS
MATHEMATICAL OPERATORS
OXIDES
OXYGEN COMPOUNDS
PAIRING INTERACTIONS
PARAMAGNETISM
PARTIAL WAVES
PARTICLE PROPERTIES
QUANTUM OPERATORS
QUASI PARTICLES
RESONANCE
S WAVES
SPIN
SUPERCONDUCTORS
SYMMETRY
TRANSITION ELEMENT COMPOUNDS
VARIATIONS