Non-Fermi Liquid Behaviour in d = 2 Spatial Dimension
Strongly Correlated Electrons
2008-02-03 v1
Abstract
We consider a local effective model for fermionic low lying excitations in a metal. Introducing a boson auxiliary field and taking into account that the most significant interactions between quasiparticles arise for those which are near a given point on the Fermi surface, we find that the effective boson-fermion interaction is singular for a spatial dimension d=2. We regularize the theory and apply the renormalization group method. As we vary the coupling constant as a function of an energy scale parameter we show that the model undergoes a non-perturbative regime in which the Fermi liquid theory is no longer valid.
Cite
@article{arxiv.cond-mat/9705057,
title = {Non-Fermi Liquid Behaviour in d = 2 Spatial Dimension},
author = {A. Ferraz and S. L. Garavelli and T. Saikawa},
journal= {arXiv preprint arXiv:cond-mat/9705057},
year = {2008}
}
Comments
10 pages, LaTeX (with REVTeX), 3 Postscript figures, submitted to Phys. Rev. Lett