Spectral Properties of the Attractive Hubbard Model

Дата и время публикации : 1998-02-10T18:41:42Z

Авторы публикации и институты :
M. Letz
R. J. Gooding

Ссылка на журнал-издание: J. of Phys. Chem. Sol. 59, (10-12) 1838 (1998)
Коментарии к cтатье: 4 pages including 2 figures, to appear in the proceedings of the SNS’97
Первичная категория: cond-mat.str-el

Все категории : cond-mat.str-el, cond-mat.supr-con

Краткий обзор статьи: 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.

Category: Physics