One-Electron Spectral Functions of the Attractive Hubbard Model for Intermediate Coupling

Preprint

16 April 1997

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9704136

Abstract

We calculate the one-electron spectral function of the attractive (negative-$U$) Hubbard model. We work in the intermediate coupling and low density regime and obtain the self-energy in an approximate analytical form. The excitation spectrum is found to consist of three branches. The results are obtained in a framework, based on the self-consistent T-matrix approximation, which is compatible with the Mermin-Wagner theorem.

Keywords

ELECTRON SPECTRAL FUNCTION
INTERMEDIATE COUPLING
SPECTRAL FUNCTIONS
ATTRACTIVE HUBBARD
APPROXIMATION
HUBBARD MODEL

All Related Versions

Version 1, 1997-04-16, ArXiv
Published version: Physical Review B, 57 (10), 5995.

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