Anisotropic superconductivity in the two-dimensional Hubbard model

Journal Article · Wed Feb 01 04:00:00 EST 1995 · Journal of Superconductivity

DOI:https://doi.org/10.1007/BF00732255· OSTI ID:81623

Zielinski, J; Mierzejewski, M; Entel, P ^[1]; Grabowski, R ^[1]

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1. Univ. of Silesia, Katowice (Poland)

The authors address the problem of anisotropic superconductivity in the two-dimensional Hubbard model. The Eliashberg equations have been generalized to the case which accounts for the anisotropy of the order parameter. Strong local correlations are treated within the mean field slave boson approximation. The superconducting transition temperature {Tc} is evaluated as a function of the occupation number. These results indicate that the d-wave state is the most likely channel for superconductivity for small concentration of holes. The authors have also derived an approximate analytical formula for {Tc} valid for any value of the occupation number. In addition, the influence of strong correlations on the electron-phonon coupling function is also discussed.

• Sponsoring Organization: USDOE
• OSTI ID: 81623
• Journal Information: Journal of Superconductivity, Journal Name: Journal of Superconductivity Journal Issue: 1 Vol. 8; ISSN 0896-1107; ISSN JOUSEH
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
ELECTRON-PHONON COUPLING
GORKOV-ELIASHBERG THEORY
HIGH-TC SUPERCONDUCTORS
HUBBARD MODEL
SUPERCONDUCTIVITY
TWO-DIMENSIONAL CALCULATIONS