Regensburg 2016 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 58: Transport: Poster Session

TT 58.5: Poster

Mittwoch, 9. März 2016, 15:00–18:30, Poster D

Andreev current through a quantum dot with spin-orbit coupling — •Daniel Spannenkrebs, Stephan Weiß, and Jürgen König — Theoretische Physik, Universität Duisburg-Essen and CENIDE, 47048 Duisburg, Germany

We study an interacting quantum dot in the presence of spin-orbit interaction. The dot is coupled to a normal and a superconducting lead. We integrate out the superconductor in the limit of an infinite gap Δ → ∞. This yields a model which consists of the normal lead and an effective dot with finite pairing amplitude. The coupling of the normal lead to the effective system is taken into account by a real-time diagrammatic method [1]. The calculation of the nonequilibrium Andreev current allows us to investigate the interplay between SO coupling and superconducting correlations on the quantum dot.
[1] M. Governale, M. G. Pala, and J. König, PRB 77, 134513 (2008).