Generation of d-wave coupling in the two-dimensional Hubbard model from functional renormalization
Strongly Correlated Electrons
2009-11-13 v2 High Energy Physics - Theory
Abstract
Within the two-dimensional repulsive t-t'-Hubbard model, an attractive coupling in the d-wave pairing channel is induced by antiferromagnetic fluctuations. We investigate this coupling using functional renormalization group equations. The momentum dependent d-wave coupling can be bosonized by the use of scale dependent field transformations. We propose an effective coarse grained model for the Hubbard model which is based on the exchange of antiferromagnetic and d-wave collective bosons.
Cite
@article{arxiv.0801.1773,
title = {Generation of d-wave coupling in the two-dimensional Hubbard model from functional renormalization},
author = {H. C. Krahl and J. A. Müller and C. Wetterich},
journal= {arXiv preprint arXiv:0801.1773},
year = {2009}
}
Comments
11 pages, 13 figures, equivalent to published version