Josephson current in s-wave superconductor / Sr_2RuO_4 junctions

Details Josephson current in s-wave superconductor / Sr_2RuO_4 junctions Josephson current in s-wave superconductor / Sr_2RuO_4 junctions

2002-12-16

arxiv.org/abs/cond-mat/0212353v1

Physical Review B 67, 184505 (2003).

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevB.67.184505

The Josephson current between an s-wave and a spin-triplet superconductor Sr$_2$RuO$_4$ (SRO) is studied theoretically. In spin-singlet / spin-triplet superconductor junctions, there is no Josephson current proportional to $\sin \phi$ in the absence of the spin-flip scattering near junction interfaces, where $\phi$ is a phase-difference across junctions. Thus a dominant term of the Josephson current is proportional to $\sin 2\phi$ . The spin-orbit scattering at the interfaces gives rise to the Josephson current proportional to $\cos\phi$, which is a direct consequence of the chiral paring symmetry in SRO.

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