Kondo-Dicke resonances in electronic transport through triple quantum dots

Details Kondo-Dicke resonances in electronic transport through triple quantum dots Kondo-Dicke resonances in electronic transport through triple quantum dots

2008-03-28

arxiv.org/abs/0803.4154v1

Phys. Rev. B 78, 075424 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 10 figures

Scientific paper

10.1103/PhysRevB.78.075424

Electronic transport through a triple quantum dot system, with only a single dot coupled directly to external leads, is considered theoretically. The model includes Coulomb correlations in the central dot, while such correlations in the two side-coupled dots are omitted. The infinite-U mean-field slave-boson approach is used to obtain basic transport characteristics in the Kondo regime. When tuning position of the side-coupled dots' levels, transition from subradiant to superradiant like mode (and vice versa) has been found in the spectral function, in analogy to the Dicke effect in atomic physics. Bias dependence of the differential conductance and zero frequency shot noise is also analysed.

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