Phase-sensitive tests of the pairing state symmetry in Sr2RuO4

Details Phase-sensitive tests of the pairing state symmetry in Sr2RuO4 Phase-sensitive tests of the pairing state symmetry in Sr2RuO4

2005-06-28

arxiv.org/abs/cond-mat/0506745v1

Phys. Rev. Lett. 95, 217004 (2005)

Physics

Condensed Matter

Superconductivity

4 pages, 1 figure

Scientific paper

10.1103/PhysRevLett.95.217004

Exotic superconducting properties of Sr$_{2}$RuO$_{4}$ have provided strong support for an unconventional pairing symmetry. However, the extensive efforts over the past decade have not yet unambiguously resolved the controversy about the pairing symmetry in this material. While recent phase-sensitive experiments using flux modulation in Josephson junctions consisting of Sr$_{2}$RuO$_{4}$ and a conventional superconductor have been interpreted as conclusive evidence for a chiral spin-triplet pairing, we propose here an alternative interpretation. We show that an overlooked chiral spin-singlet pairing is also compatible with the observed phase shifts in Josephson junctions and propose further experiments which would distinguish it from its spin-triplet counterpart.

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