0 Ja n 20 05 Marginal Fermi Liquid Theory in the Hubbard Model

Abstract

We find Marginal Fermi Liquid (MFL) like behavior in the Hubbard model on a square lattice for a range of hole doping and on-site interaction parameter U . Thereby we use a self-consistent projection operator method. It enables us to compute the momentum and frequency dependence of the single-particle excitations with high resolution. The Fermi surface is found to be hole-like in the underdoped and electron-like in the overdoped regime. When a comparison is possible we find consistency with finite temperature quantum Monte Carlo results. We also find a discontinuous change with doping concentration from a MFL to Fermi liquid behavior resulting from a collapse of the lower Hubbard band. This renders Luttinger’s theorem inapplicable in the underdoped regime. PACS: 71.10.-w, 79.60.Bm, 71.18.+y, 74.72.-h Typeset using REVTEX

Cite this paper

@inproceedings{Kakehashi20140JN, title={0 Ja n 20 05 Marginal Fermi Liquid Theory in the Hubbard Model}, author={Yoshiro Kakehashi and Peter Fulde}, year={2014} }