Friedel oscillations induced by non-magnetic impurities in the two-dimensional Hubbard model

Details Friedel oscillations induced by non-magnetic impurities in the two-dimensional Hubbard model Friedel oscillations induced by non-magnetic impurities in the two-dimensional Hubbard model

1997-04-23

arxiv.org/abs/cond-mat/9704193v1

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages, RevTeX, includes 8 figures

Scientific paper

10.1103/PhysRevB.58.4362

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.

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