Spectral functions in itinerant electron systems with geometrical frustration
Strongly Correlated Electrons
2009-11-07 v1
Abstract
The Hubbard model with geometrical frustration is investigated in a metallic phase close to half-filling. We calculate the single particle spectral function for the triangular lattice within dynamical cluster approximation, which is further combined with non-crossing approximation and fluctuation exchange approximation to treat the resulting cluster Anderson model. It is shown that frustration due to non-local correlations suppresses short-range antiferromagnetic fluctuations and thereby assists the formation of heavy quasi-particles near half-filling.
Keywords
Cite
@article{arxiv.cond-mat/0204093,
title = {Spectral functions in itinerant electron systems with geometrical frustration},
author = {Yoshiki Imai and Norio Kawakami},
journal= {arXiv preprint arXiv:cond-mat/0204093},
year = {2009}
}
Comments
4 pages, 5 eps figures