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APS » Journals » Phys. Rev. Lett. » Volume 101 » Issue 26
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Phys. Rev. Lett. 101, 266803 (2008) [4 pages]

Controlling the Kondo Effect in CoCun Clusters Atom by Atom

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N. Néel1, J. Kröger1,*, R. Berndt1, T. O. Wehling2, A. I. Lichtenstein2, and M. I. Katsnelson3
1Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, D-24098 Kiel, Germany
2Institut für Theoretische Physik I, Universität Hamburg, D-20355 Hamburg, Germany
3Institute for Molecules and Materials, Radboud University Nijmegen, NL-6525 AJ Nijmegen, The Netherlands

Received 1 October 2008; published 30 December 2008

Clusters containing a single magnetic impurity were investigated by scanning tunneling microscopy, spectroscopy, and ab initio electronic structure calculations. The Kondo temperature of a Co atom embedded in Cu clusters on Cu(111) exhibits a nonmonotonic variation with the cluster size. Calculations model the experimental observations and demonstrate the importance of the local and anisotropic electronic structure for correlation effects in small clusters.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.266803
DOI:
10.1103/PhysRevLett.101.266803
PACS:
73.20.Fz, 68.37.Ef, 72.15.Qm

*kroeger@physik.uni-kiel.de

 
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