Attractive pairing potential from the repulsive extended Hubbard model on a two dimensional square lattice

Journal Article · Tue Dec 01 00:00:00 EST 1992 · Bulletin of the American Physical Society

OSTI ID:127779

Choy, T C ^[1]; Das, M P ^[2]

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1. Monash Univ. (Australia)
2. Australian National Univ. (Australia)

The authors have examined the two dimensional repulsive extended Hubbard model on a square lattice, using standard many-body diagrammatic techniques. By summing an infinite series of two renormalised loops for the self-energy, they have found that for specific regions in the parameter space of (U,W), the renormalised Coulomb interaction can become attractive. In addition they have also included the effects of second order diagrams, pertaining to paramagnon effects in BCS superconductors. These results may form the basis for a mechanism of high T{sub c} superconductors.

• OSTI ID: 127779
• Report Number(s): CONF-920376-; ISSN 0003-0503; TRN: 96:000262
• Journal Information: Bulletin of the American Physical Society, Vol. 37, Issue 9; Conference: Meeting of the American Physical Society, Indianapolis, IN (United States), 16-20 Mar 1992; Other Information: PBD: Dec 1992
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
SUPERCONDUCTIVITY
HUBBARD MODEL
PAIRING ENERGY
TWO-DIMENSIONAL CALCULATIONS