Effects of spin-orbit coupling and spatial symmetries on the Josephson current in SNS junctions
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.
Keywords
Cite
@article{arxiv.1510.05251,
title = {Effects of spin-orbit coupling and spatial symmetries on the Josephson current in SNS junctions},
author = {Asbjørn Rasmussen and Jeroen Danon and Henri Suominen and Fabrizio Nichele and Morten Kjaergaard and Karsten Flensberg},
journal= {arXiv preprint arXiv:1510.05251},
year = {2016}
}
Comments
6 pages, 3 figures; 5 pages supplementary