Superconductivity in a two dimensional extended Hubbard model

Abstract

The Roth's two-pole approximation has been used by the present authors to investigate the role of $d-p$ hybridization in the superconducting properties of an extended $d-p$ Hubbard model. Superconductivity with singlet $d_{x^2-y^2}$-wave pairing is treated by following Beenen and Edwards formalism. In this work, the Coulomb interaction, the temperature and the superconductivity have been considered in the calculation of some relevant correlation functions present in the Roth's band shift. The behavior of the order parameter associated with temperature, hybridization, Coulomb interaction and the Roth's band shift effects on superconductivity are studied.

14 pages, 8 figures, accepted for publication in European Physical Journal B

References in corpus (9)

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Cited by in corpus (9)

• Bands renormalization and superconductivity in the strongly correlated Hubbard model using composite operators method
• Spectral Function of a $d-p$ Hubbard Model
• Superconductivity in an extended Hubbard model with attractive interaction
• The interplay between a pseudogap and superconductivity in a two-dimensional Hubbard model
• Effects of a k-dependent Hybridization on the Fermi Surface of an Extended $d-p$ Hubbard Model
• Interplay between the charge density wave phase and a pseudogap under antiferromagnetic correlations
• Pseudogap and the specific heat of high T${}_c$ superconductors: a Hubbard model in a n-pole approximation
• Compressibility of a two-dimensional extended Hubbard model
• Coexistence of superconductivity and charge density wave in a correlated regime