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Phys. Rev. Lett. 95, 077202 (2005) [4 pages]

Exotic Kondo Effect from Magnetic Trimers

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B. Lazarovits1, P. Simon2, G. Zaránd3, and L. Szunyogh1,3
1Center for Computational Materials Science, Vienna University of Technology, A-1060, Gumpendorferstr. 1.a., Vienna, Austria
2Laboratoire de Physique et Modélisation des Milieux Condensés, CNRS et Université Joseph Fourier, 38042 Grenoble, France
3Theoretical Physics Department, Budapest University of Technology and Economics, Budafoki út 8. H-1521 Hungary

Received 15 July 2004; published 9 August 2005

Motivated by the recent experiments of Jamneala et al. [ Phys. Rev. Lett. 87 256804 (2001)] by combining ab initio and renormalization group methods, we study the strongly correlated state of a Cr trimer deposited on gold. Internal orbital fluctuations of the trimer lead to a huge increase of TK compared to the single ion Kondo temperature explaining the experimental observation of a zero-bias anomaly for the trimers. The strongly correlated state seems to belong to a new yet hardly explored class of non-Fermi-liquid fixed points.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.077202
DOI:
10.1103/PhysRevLett.95.077202
PACS:
75.20.Hr, 71.27.+a, 72.15.Qm
 
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