Anomalous Josephson Current through a Spin-Orbit Coupled Quantum Dot
A. Zazunov, R. Egger, T. Jonckheere, T. Martin
DOI 10.1103/PhysRevLett.103.147004 · Physical Review Letters
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Abstract
For a general model of a mesoscopic multilevel 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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