Pairing by dynamic charge fluctuations in the extended Hubbard model

Journal Article · Sat Sep 01 04:00:00 EDT 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.42.4865· OSTI ID:6228756

Bang, Y; Quader, K; Abrahams, E ^[1]; Littlewood, P B ^[2]

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1. Serin Physics Laboratory, Rutgers University, Piscataway, NJ (USA)
2. AT T Bell Laboratories, Murray Hill, NJ (USA)

We consider superconductivity mediated by a charge-transfer resonance (CTR) in the weak-coupling approach to the three-band extended Hubbard model for the copper oxide superconductors. Our effective pairing interaction contains the dynamics of the CTR, and local-field effects. Unlike previous work, we solve the linearized Eliashberg equations {ital on} {ital the} {ital lattice} while retaining the full momentum dependence of the interaction and wave functions. We find that the highest {ital T}{sub {ital c}} occurs for an admixture of the extended and uniform {ital s}-wave states and we obtain the frequency dependence of the gap function.

• OSTI ID: 6228756
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 42:7; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BAND THEORY
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
FUNCTIONS
GORKOV-ELIASHBERG THEORY
HIGH-TC SUPERCONDUCTORS
INTERACTIONS
OXIDES
OXYGEN COMPOUNDS
PAIRING INTERACTIONS
PHYSICAL PROPERTIES
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
WAVE FUNCTIONS