Coulomb oscillations of the Fano-Kondo effect and zero bias anomalies in the double dot meso-transistor

Details Coulomb oscillations of the Fano-Kondo effect and zero bias anomalies in the double dot meso-transistor Coulomb oscillations of the Fano-Kondo effect and zero bias anomalies in the double dot meso-transistor

2011-01-28

arxiv.org/abs/1101.5439v1

Phys. Rev. B 83, 245317 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

19 pages, 8 figures

Scientific paper

We investigate theoretically the transport properties of the side-coupled double quantum dots in connection with the experimental study of Sasaki {\it et al.} Phys.Rev.Lett.{\bf 103}, 266806 (2009). The novelty of the set-up consists in connecting the Kondo dot directly to the leads, while the side dot provides an interference path which affects the Kondo correlations. We analyze the oscillations of the source-drain current due to the periodical Coulomb blockade of the many-level side-dot at the variation of the gate potential applied on it. The Fano profile of these oscillations may be controlled by the temperature, gate potential and interdot coupling. The non-equilibrium conductance of the double dot system exhibits zero bias anomaly which, besides the usual enhancement, may show also a suppression (a dip-like aspect) which occurs around the Fano {\it zero}. In the same region, the weak temperature dependence of the conductance indicates the suppression of the Kondo effect. Scaling properties of the non-equilibrium conductance in the Fano-Kondo regime are discussed. Since the SIAM Kondo temperature is no longer the proper scaling parameter, we look for an alternative specific to the double-dot. The extended Anderson model, Keldysh formalism and equation of motion technique are used.

Affiliated with

Also associated with

No associations

Rating

Coulomb oscillations of the Fano-Kondo effect and zero bias anomalies in the double dot meso-transistor does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Coulomb oscillations of the Fano-Kondo effect and zero bias anomalies in the double dot meso-transistor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coulomb oscillations of the Fano-Kondo effect and zero bias anomalies in the double dot meso-transistor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-551442