A field-theoretical approach to the extended Hubbard model
Superconductivity
2015-05-18 v1 Strongly Correlated Electrons
Abstract
We transform the quartic Hubbard terms in the extended Hubbard model to a quadratic form by making the Hubbard-Stratonovich transformation for the electron operators. This transformation allows us to derive exact results for mass operator and charge-charge and spin-spin correlation functions for s-wave superconductivity. We discuss the application of the method to the d-wave superconductivity.
Keywords
Cite
@article{arxiv.1002.0254,
title = {A field-theoretical approach to the extended Hubbard model},
author = {Z. Koinov},
journal= {arXiv preprint arXiv:1002.0254},
year = {2015}
}