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Kondo effect and conductance of nanocontacts with magnetic impurities

We study the impact of dynamical correlations on the electronic structure and coherent transport properties of Cu nanocontacts hosting a single magnetic impurity (Ni,Co,Fe) in the contact region. The strong dynamical correlations of the impurity 3d-electrons are fully taken into account by combining density functional calculations with a dynamical treatment of the impurity 3d-shell in the one-crossing approximation. We find that dynamical correlations give rise to the Kondo effect and lead to Fano features in the coherent transport characteristics similar to those observed in related experiments.

preprint2009arXivOpen access
D. JacobK. HauleG. Kotliar
cond-mat.mes-hallcond-mat.str-el
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D. JacobK. HauleG. Kotliar

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