title: Kondo tunneling through real and artificial molecules.
abstract: 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.
authors: Department of Physics, Ben-Gurion University, Beer-Sheva 84 105, Israel.
authors: K
authors: K
authors: Kikoin
authors: Y
authors: Y
authors: Avishai