Regensburg 2010 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 36: TR: Poster Session

TT 36.7: Poster

Donnerstag, 25. März 2010, 14:00–18:00, Poster A

Quantum transport through magnetic quantum dots — •Benjamin Baxevanis and Daniela Pfannkuche — I. Institute for Theoretical Physics, University of Hamburg, D-20355 Hamburg, Germany

The non-equilibrium transport of charge carriers through magnetic quantum dots is studied theoretically. A single-level quantum dot with a coupling of the electron spin to a local spin 1/2 of a magnetic impurity represents the underlying model. The Coulomb interaction of two electrons as well as the interaction between electrons and the spin impurity are taken into account in a numerically exact manner by means of the recently proposed real-time version of the diagrammatic Monte Carlo method [1]. This approach is applied to investigate the transient dynamics in the system subject to external parameters. In particular, the effects due to the mutual interplay between charge carriers and the impurity spin are examined.

[1] P. Werner, T. Oka, and A. J. Millis, Phys. Rev. B 79, 035320 (2009)