Static and dynamical properties of a magnetic impurity in a strongly correlated electronic system

Details Static and dynamical properties of a magnetic impurity in a strongly correlated electronic system Static and dynamical properties of a magnetic impurity in a strongly correlated electronic system

1995-05-26

arxiv.org/abs/cond-mat/9505131v2

Phys. Rev. B 52, 374 (1995)

Physics

Condensed Matter

10 pages of text in Latex + 6 figures in uuencoded form containing the 6 postscripts (mailed separately). Fig. 4 is added to t

Scientific paper

10.1103/PhysRevB.52.374

Using numerical techniques we study the zero temperature properties of a substitutional magnetic impurity in a one-dimensional correlated system described by the Hubbard model with repulsive interaction $U$. We find that, while the static spin correlation maintains a $2k_F$ periodicity, the charge correlations show Friedel oscillations with a $4k_F$ periodicity for large values of $U$. The static on-site susceptibility decreases as the interactions in the chain are turned on and we interpret this as an increase of the Kondo temperature. For large values of $U$ the short range antiferromagnetic correlations dominate over the collective Kondo singlet formation.

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