Effects of spin-orbit coupling and spatial symmetries on the Josephson current in SNS junctions

Asbjørn Rasmussen, Jeroen Danon, Henri Suominen, Fabrizio Nichele, Morten Kjaergaard, and Karsten Flensberg
Phys. Rev. B 93, 155406 – Published 5 April 2016
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Abstract

We present an analysis of the symmetries of the interference pattern of critical currents through a two-dimensional superconductor-semiconductor-superconductor junction, taking into account Rashba and Dresselhaus spin-orbit interaction, an arbitrarily oriented magnetic field, disorder, and structural asymmetries. We relate the symmetries of the pattern to the absence or presence of symmetries in the Hamiltonian, which provides a qualitative connection between easily measurable quantities and the spin-orbit coupling and other symmetries of the junction. We support our analysis with numerical calculations of the Josephson current based on a perturbative expansion up to eighth order in tunnel coupling between the normal region and the superconductors.

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  • Received 18 October 2015
  • Revised 15 March 2016

DOI:https://doi.org/10.1103/PhysRevB.93.155406

©2016 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Asbjørn Rasmussen1, Jeroen Danon1,2, Henri Suominen1, Fabrizio Nichele1, Morten Kjaergaard1, and Karsten Flensberg1

  • 1Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark
  • 2Niels Bohr International Academy, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark

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Issue

Vol. 93, Iss. 15 — 15 April 2016

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