Fano resonance in electronic transport through a quantum wire with a side-coupled quantum dot: X-boson treatment

Details Fano resonance in electronic transport through a quantum wire with a side-coupled quantum dot: X-boson treatment Fano resonance in electronic transport through a quantum wire with a side-coupled quantum dot: X-boson treatment

2002-09-16

arxiv.org/abs/cond-mat/0209359v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 10 eps figs., revtex4

Scientific paper

10.1103/PhysRevB.67.155301

The transport through a quantum wire with a side coupled quantum dot is studied. We use the X-boson treatment for the Anderson single impurity model in the limit of $U=\infty $. The conductance presents a minimum for values of T=0 in the crossover from mixed-valence to Kondo regime due to a destructive interference between the ballistic channel associated with the quantum wire and the quantum dot channel. We obtain the experimentally studied Fano behavior of the resonance. The conductance as a function of temperature exhibits a logarithmic and universal behavior, that agrees with recent experimental results.

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