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Kondo tunneling through real and artificial molecules

Kondo tunneling through real and artificial molecules

Physical Review Letters 86(10): 2090-2093

When an asymmetric double dot is hybridized with itinerant electrons, its singlet ground state and lowly excited triplet state cross, leading to a competition between the Zhang-Rice mechanism of singlet-triplet splitting in a confined cluster and the Kondo effect (which accompanies the tunneling through quantum dot under a Coulomb blockade restriction). The rich physics of an underscreened S = 1 Kondo impurity in the presence of low-lying triplet-singlet excitations is exposed and estimates of the magnetic susceptibility and the electric conductance are presented, together with applications for molecule chemisorption on metallic substrates.

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Accession: 046508978

Download citation: RISBibTeXText

PMID: 11289862

DOI: 10.1103/PhysRevLett.86.2090

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