We derive the qualitative behavior of superconductor-antiferromagnet- superconductor (SAS) Josephson junctions described by Zhang's SO(5) theory. The main differences between these junctions and conventional SIS junctions arise from the non-sinusoidal current-phase relation derived by Demler et al. for thin SAS junctions. Using a simple approximation to this non-sinusoidal function, the current voltage relation, Shapiro steps, thermal fluctuation effects and the diffraction pattern in a magnetic field are obtained.
@article{arxiv.cond-mat/9811133,
title = {Properties of SAS Josephson junctions in SO(5) theory},
author = {B. C. den Hertog and A. J. Berlinsky and C. Kallin},
journal= {arXiv preprint arXiv:cond-mat/9811133},
year = {2007}
}