Spectral Properties of the Attractive Hubbard Model

Details Spectral Properties of the Attractive Hubbard Model Spectral Properties of the Attractive Hubbard Model

1998-02-10

arxiv.org/abs/cond-mat/9802110v1

J. of Phys. Chem. Sol. 59, (10-12) 1838 (1998)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages including 2 figures, to appear in the proceedings of the SNS'97

Scientific paper

10.1016/S0022-3697(98)00123-1

Deviations from Fermi liquid behavior are well documented in the normal state of the cuprate superconductors, and some of these differences are possibly related to pre-formed pairs appearing at temperatures above T_c. In order to test these ideas we have investigated the attractive Hubbard model within a self-consistent, conserving ladder approximation. In this version of the theory, no feature is present which can be related to the pseudo gap found in the high-T_c materials. Further, the interactions between two-particle bound states change the physics of the superconducting instability in a profound fashion, and lead to a completely different phenomenology that one predicts based on the non-self-consistent version of the same theory.

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