title: Exotic Kondo effect from magnetic trimers.
abstract: 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 T(K) 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.
authors.affiliation: Center for Computational Materials Science, Vienna University of Technology, Austria.
authors.forename: B
authors.initials: B
authors.lastname: Lazarovits
authors.forename: P
authors.initials: P
authors.lastname: Simon
authors.forename: G
authors.initials: G
authors.lastname: Zaránd
authors.forename: L
authors.initials: L
authors.lastname: Szunyogh