Functional Renormalization Group calculation of the Fermi surface of a spin-ladder
Strongly Correlated Electrons
2016-08-14 v1
Abstract
We study non conventional superconductivity on a ladder, improving the predictions of the Hubbard model. The determination of the Fermi surface, in 2 or 3 dimensions, remains a very hard task, but it is exactly solvable for a single ladder. We use functional Renormalisation Group methods, which prove, here, scheme-dependant. In the superconducting phase, the binding/antibinding gap is stabilized, but in the antiferromagnetic phase, it shrinks and the ladder turns one-dimensional.
Cite
@article{arxiv.cond-mat/0702440,
title = {Functional Renormalization Group calculation of the Fermi surface of a spin-ladder},
author = {Gilles Abramovici and Michel Héritier},
journal= {arXiv preprint arXiv:cond-mat/0702440},
year = {2016}
}