The Josephson current between an s-wave and a spin-triplet superconductor Sr2RuO4 (SRO) is studied theoretically. In spin-singlet / spin-triplet superconductor junctions, there is no Josephson current proportional to sinϕ in the absence of the spin-flip scattering near junction interfaces, where ϕ is a phase-difference across junctions. Thus a dominant term of the Josephson current is proportional to sin2ϕ . The spin-orbit scattering at the interfaces gives rise to the Josephson current proportional to cosϕ, which is a direct consequence of the chiral paring symmetry in SRO.
@article{arxiv.cond-mat/0212353,
title = {Josephson current in s-wave superconductor / Sr_2RuO_4 junctions},
author = {Y. Asano and Y. Tanaka and M. Sigrist and S. Kashiwaya},
journal= {arXiv preprint arXiv:cond-mat/0212353},
year = {2009}
}