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arXiv · 0909.3036

Anomalous Josephson current through a spin-orbit coupled quantum dot

A. Zazunov·R. Egger·T. Jonckheere·T. Martin
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Abstract

For a general model of a mesoscopic multi-level quantum dot, we determine the necessary conditions for the existence of an anomalous Josephson current with spontaneously broken time-reversal symmetry. They correspond to a finite spin-orbit coupling, a suitably oriented Zeeman field, and the dot being a chiral conductor. We provide analytical expressions for the anomalous supercurrent covering a wide parameter regime.

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A. Zazunov, R. Egger, T. Jonckheere, T. Martin. 2009-09-16. Anomalous Josephson current through a spin-orbit coupled quantum dot. https://doi.org/10.1103/physrevlett.103.147004

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