One-Electron Spectral Functions of the Attractive Hubbard Model for Intermediate Coupling
Condensed Matter
2016-08-15 v1
Abstract
We calculate the one-electron spectral function of the attractive (negative-) 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
Cite
@article{arxiv.cond-mat/9704136,
title = {One-Electron Spectral Functions of the Attractive Hubbard Model for Intermediate Coupling},
author = {Maxim Yu. Kagan and Raymond Frésard and Massimiliano Capezzali and Hans Beck},
journal= {arXiv preprint arXiv:cond-mat/9704136},
year = {2016}
}
Comments
7 pages, revtex, 7 figures in postscript format, submitted to PRB