Marginal Fermi liquid behaviour in the d=2 Hubbard model with cut-off
Strongly Correlated Electrons
2015-06-24 v1
Abstract
We consider the half-filled Hubbard model with a cut-off forbidding momenta close to the angles of the square shaped Fermi surface. By Renormalization Group methods we find a convergent expansion for the Schwinger function up to exponentially small temperatures. We prove that the system is not a Fermi liquid, but on the contrary it behaves like a Marginal Fermi liquid, a behaviour observed in the normal phase of high T_c superconductors.
Cite
@article{arxiv.cond-mat/0211136,
title = {Marginal Fermi liquid behaviour in the d=2 Hubbard model with cut-off},
author = {V. Mastropietro},
journal= {arXiv preprint arXiv:cond-mat/0211136},
year = {2015}
}