Superconductivity in the multiband Hubbard model with long-range Coulomb repulsion

Journal Article · Mon Aug 01 04:00:00 EDT 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.50.3215· OSTI ID:7079497

Riera, J ^[1]; Dagotto, E ^[2]

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1. Center for Computationally Intensive Physics, Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States) Department of Physics Astronomy, Vanderbilt University, Nashville, Tennessee 37235 (United States)
2. Department of Physics, National High Magnetic Field Laboratory, MARTECH, Florida State University, Tallahassee, Florida 32306 (United States)

A multiband CuO Hubbard model is studied which incorporates long-range (LR) repulsive Coulomb interactions. In the atomic limit, it is shown that a charge transfer from copper to oxygen ions occurs as the strength of the LR interaction is increased. The regime of phase separation is replaced by a uniform state with doubly occupied oxygens. As the holes become mobile a superfluid condensate is formed, as suggested by a numerical analysis of pairing correlations and flux quantization on one-dimensional chains. The competition between charge-density wave and superconductivity is also analyzed. It is argued that the results are also applicable to two dimensions.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 7079497
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 50:5; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHARGE EXCHANGE
COPPER COMPOUNDS
COULOMB FIELD
CRYSTAL MODELS
CUPRATES
ELECTRIC FIELDS
ELECTRONIC STRUCTURE
HIGH-TC SUPERCONDUCTORS
HUBBARD MODEL
MATHEMATICAL MODELS
OXYGEN COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS