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29 March 2024
 
  » arxiv » cond-mat/0204380

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Landau-Fermi liquid analysis of the 2D t-t' Hubbard model
P. A. Frigeri ; C. Honerkamp ; T. M. Rice ;
Date 17 Apr 2002
Subject Strongly Correlated Electrons | cond-mat.str-el
AbstractWe calculate the Landau interaction function f(k,k’) for the two-dimensional t-t’ Hubbard model on the square lattice using second and higher order perturbation theory. Within the Landau-Fermi liquid framework we discuss the behavior of spin and charge susceptibilities as function of the onsite interaction and band filling. In particular we analyze the role of elastic umklapp processes as driving force for the anisotropic reduction of the compressibility on parts of the Fermi surface.
Source arXiv, cond-mat/0204380
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