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Orbital Kondo effect in Cobalt-Benzene sandwich molecules | | M. Karolak
; D. Jacob
; A.I. Lichtenstein
; | | Date: |
24 May 2011 | | Abstract: | We study a Co-benzene sandwich molecule bridging the tips of a Cu nanocontact
as a realistic model of correlated molecular transport. To this end we employ a
recently developed method for calculating the correlated electronic structure
and transport properties of nanoscopic conductors. When the molecule is
slightly compressed by the tips of the nanocontact the dynamic correlations
originating from the strongly interacting Co 3d shell give rise to an orbital
Kondo effect while the usual spin Kondo effect is suppressed due to Hund’s rule
coupling. This non-trivial Kondo effect produces a sharp and
temperature-dependent Abrikosov-Suhl resonance in the spectral function at the
Fermi level and a corresponding Fano line shape in the low bias conductance. | | Source: | arXiv, 1105.4803 | | Services: | Forum | Review | PDF | Favorites | |
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