Friedel oscillations induced by non-magnetic impurities in the two-dimensional Hubbard model
Strongly Correlated Electrons
2009-10-30 v1
Abstract
We study the interplay of correlations and disorder using an unrestricted Slave-Boson technique in real space. Within the saddle-point approximation, we find Friedel oscillations of the charge density in the vicinity of a nonmagnetic impurity, in agreement with numerical simulations. The corresponding amplitudes are suppressed by repulsive interactions, while attractive correlations lead to a charge-density-wave enhancement. In addition, we investigate the spatial dependence of the local magnetic moment and the formation of a magnetic state at the impurity site.
Keywords
Cite
@article{arxiv.cond-mat/9704193,
title = {Friedel oscillations induced by non-magnetic impurities in the two-dimensional Hubbard model},
author = {W. Ziegler and H. Endres and W. Hanke},
journal= {arXiv preprint arXiv:cond-mat/9704193},
year = {2009}
}
Comments
9 pages, RevTeX, includes 8 figures