Spin-sensitive Long-ranged Proximity Effect for Triplet Superconductors

Details Spin-sensitive Long-ranged Proximity Effect for Triplet Superconductors Spin-sensitive Long-ranged Proximity Effect for Triplet Superconductors

2010-09-15

arxiv.org/abs/1009.3014v1

Phys. Rev. B 83, 060508(R) (2011)

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures

Scientific paper

The discovery of noncentrosymmetric superconductors, such as CePt$_3$Si, and chiral superconductors, such as Sr$_2$RuO$_4$, calls for experimental methods to identify the presence of spin-triplet pairing. We here demonstrate a method which accomplishes this in an appealingly simple manner: a spin-sensitive proximity effect in a ferromagnet$\mid$triplet superconductor bilayer. It is shown how the orientation of the field can be used to unambiguously distinguish between different spin-triplet states. Moreover, the proximity effect becomes long-ranged in spite of the presence of an exchange field and even without any magnetic inhomogeneities, in contrast to conventional S$\mid$F junctions. Our results can be verified by STM-spectroscopy and could be useful as a tool to characterize the pairing state in unconventional superconducting materials.

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