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arXiv · 1512.03042

Anomalous Josephson effect in semiconducting nanowires as a signature of the topologically nontrivial phase

Konstantin N. Nesterov·Manuel Houzet·Julia S. Meyer
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Abstract

We study Josephson junctions made of semiconducting nanowires with Rashba spin-orbit coupling, where superconducting correlations are induced by the proximity effect. In the presence of a suitably directed magnetic field, the system displays the anomalous Josephson effect: a nonzero supercurrent in the absence of a phase bias between two superconductors. We show that this anomalous current can be increased significantly by tuning the nanowire into the helical regime. In particular, in a short junction, a large anomalous current is a signature for topologically nontrivial superconductivity in the nanowire.

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Konstantin N. Nesterov, Manuel Houzet, Julia S. Meyer. 2016-05-07. Anomalous Josephson effect in semiconducting nanowires as a signature of the topologically nontrivial phase. https://doi.org/10.1103/physrevb.93.174502

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