Anisotropic superconductivity in the two-dimensional Hubbard model

Journal Article · Sat Nov 01 04:00:00 EST 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.56.11925· OSTI ID:544949

Mierzejewski, M; Zielinski, J ^[1]

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1. Institute of Physics, University of Silesia, 40-007 Katowice (Poland)

We address the problem of superconductivity in a system where the only many-body interactions are repulsive. The Eliashberg equations have been generalized to account for possible pairing correlations in the two-dimensional Hubbard model. Details of the two-dimensional band structure have been explicitly taken into account when considering the symmetry of the superconducting state. The pairing kernels have been discussed at low doping and at temperatures close to the superconducting transition temperature. We have proved that local Coulomb repulsion leads to attractive pairing correlations in the d-wave channel. Extended s-wave superconductivity is less likely to occur within this purely electronic model, at least in the physically interesting region of doping. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 544949
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 18 Vol. 56; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANISOTROPY
BAND THEORY
ENERGY GAP
HUBBARD MODEL
SUPERCONDUCTIVITY
TRANSITION TEMPERATURE