Spin-sensitive long-range proximity effect in ferromagnet/spin-triplet-superconductor bilayers

Gaetano Annunziata; Mario Cuoco; Canio Noce; Asle Sudbø; Jacob Linder

doi:10.1103/PhysRevB.83.060508

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Spin-sensitive long-range proximity effect in ferromagnet/spin-triplet-superconductor bilayers

Gaetano Annunziata, Mario Cuoco, Canio Noce, Asle Sudbø, Jacob Linder

DOI 10.1103/PhysRevB.83.060508 · Physical Review B

T1

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Abstract

The discovery of noncentrosymmetric superconductors, such as CePt3Si, and chiral superconductors, such as Sr2RuO4, 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/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/F junctions. Our results can be verified by scanning-tunneling-microscopy spectroscopy and can be useful as a tool to characterize the pairing state in unconventional superconducting materials.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
CePt3Si Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown