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APS » Journals » Phys. Rev. B » Volume 55 » Issue 14
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Phys. Rev. B 55, R8646–R8649 (1997)

Two-impurity Kondo problem for correlated electrons

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Karen Hallberg
Max-Planck-Institut für Physik Komplexer Systeme, Bayreuther Strasse 40, D-01187 Dresden, Germany

Reinhold Egger
Fakultät für Physik, Albert-Ludwigs-Universität, Hermann-Herder-StraΒe 3, D-79104 Freiburg, Germany

Received 17 January 1997; published in the issue dated 1 April 1997

The behavior of two magnetic impurities coupled to correlated electrons in one dimension is studied using the density-matrix renormalization-group technique for several fillings. Onsite Coulomb interactions among the electrons lead to a small Kondo screening cloud and an overall suppression of magnetic order. For arbitrary electronic correlations and large interimpurity distances R, we find a 1/R2 decay of magnetic correlations.

© 1997 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.55.R8646
DOI:
10.1103/PhysRevB.55.R8646
PACS:
72.10.Fk, 72.15.Qm
 
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