Anomalous Josephson current through a spin-orbit coupled quantum dot

A. Zazunov; R. Egger; T. Jonckheere; T. Martin

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Anomalous Josephson current through a spin-orbit coupled quantum dot

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arxiv 0909.3036 v1 pith:UIO6JL7I submitted 2009-09-16 cond-mat.supr-con cond-mat.mes-hall

Anomalous Josephson current through a spin-orbit coupled quantum dot

A. Zazunov , R. Egger , T. Jonckheere , T. Martin This is my paper

classification cond-mat.supr-con cond-mat.mes-hall

keywords anomalouscurrentjosephsonquantumspin-orbitanalyticalbrokenchiral

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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.

Anomalous Josephson current through a spin-orbit coupled quantum dot

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