Kondo effects and shot noise enhancement in a laterally coupled double quantum dot

Details Kondo effects and shot noise enhancement in a laterally coupled double quantum dot Kondo effects and shot noise enhancement in a laterally coupled double quantum dot

2010-12-21

arxiv.org/abs/1012.4838v1

Physical Review B 83, 115310 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 5 figures, accepted for publication in Physical Review B

Scientific paper

The spin and orbital Kondo effects and the related shot noise for a laterally coupled double quantum dot are studied taking account of coherent indirect coupling via a reservoir. We calculate the linear conductance and shot noise for various charge states to distinguish between the spin and orbital Kondo effects. We find that a novel antiferromagnetic exchange coupling can be generated by the coherent indirect coupling, and it works to suppress the spin Kondo effect when each quantum dot holds just one electron. We also show that we can capture the feature of the pseudospin Kondo effect from the shot noise measurement.

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