Strong Coupling Approach to the d-p Model on the Basis of Fermi Liquid Theory

Details Strong Coupling Approach to the d-p Model on the Basis of Fermi Liquid Theory Strong Coupling Approach to the d-p Model on the Basis of Fermi Liquid Theory

1998-02-14

arxiv.org/abs/cond-mat/9802157v1

Physics

Condensed Matter

4 pages, 4 figures, to appear in Journal of the Physical Society of Japan Vol.67 No.4

Scientific paper

10.1143/JPSJ.67.1114

We study the superconducting transition temperature $T_c$ of the bilayer d-p model with $d_{x^2-y^2}$-wavelike attractive interaction based on the formalism first employed by Nozi\`{e}res and Schmitt-Rink. In the strong coupling regime, $T_c$ obtained through this formalism are much suppressed, compared with those through Thouless criterion only. We also find that, whether the interlayer coupling exsists or not, $T_c$ is almost propotional to the Fermi energy in the strong coupling regime. Thus, we can reproduce the essential nature in the underdoped region.

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