Kondo effect in complex mesoscopic structures

Details Kondo effect in complex mesoscopic structures Kondo effect in complex mesoscopic structures

2004-06-20

arxiv.org/abs/cond-mat/0406453v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages 6 figures

Scientific paper

10.1103/PhysRevB.71.035333

We study the Kondo effect of a quantum dot placed in a complex mesoscopic structure. Assuming that electronic interactions are taking place solely on the dot, and focusing on the infinite Hubbard interaction limit, we use a decoupling scheme to obtain an explicit analytic approximate expression for the dot Green function, which fulfills certain Fermi-liquid relations at zero temperature. The details of the complex structure enter into this expression only via the self-energy for the non-interacting case. The effectiveness of the expression is demonstrated for the single impurity Anderson model and for the T-shaped network.

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