Dresden 2011 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 47: TR: Nanoelectronics I - Quantum Dots, Wires, Point Contacts 1

TT 47.4: Vortrag

Donnerstag, 17. März 2011, 11:15–11:30, HSZ 304

Full counting statistics for the Kondo dot coupled to normal as well as ferromagnetic electrodes — •Henning Soller and Andreas Komnik — Ruprecht-Karls-Universität Heidelberg, Philosophenweg 19, 69120 Heidelberg, Germany

We investigate the interplay of the Kondo effect, superconductivity and ferromagnetic correlations in a quantum dot coupled to metallic electrodes. We concentrate on the non-equilibrium transport properties and calculate the full counting statistics of the structure in the different parameter regimes. We take into account the full energy dependence of the superconductor DOS and use an effective model for the quantum dot in the Kondo regime. We achieve good agreement with the experimental data for the non-linear current-voltage relations in the case of a normal as well as a ferromagnetic electrode coupled to the Kondo dot. This allows us to make reliable predictions for the noise and higher order cumulants. All analyzed structures represent basic building blocks of devices for generation and detection of entanglement via crossed Andreev reflection.