Cooper pair splitting in diffusive magnetic SQUIDs

Ioselevich, P.; Ostrovsky, P.; Fominov, Y.; Feigel'man, M.

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Cooper pair splitting in diffusive magnetic SQUIDs

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Ostrovsky, P.
Max Planck Society;

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Ioselevich, P., Ostrovsky, P., Fominov, Y., & Feigel'man, M. (2017). Cooper pair splitting in diffusive magnetic SQUIDs. Physical Review B, 95(9): 094508.

Cite as: https://hdl.handle.net/21.11116/0000-000E-D3DE-A

Abstract

We study Josephson junctions with weak links consisting of two parallel disordered arms with magnetic properties: ferromagnetic, half- metallic, or normal with magnetic impurities. In the case of long links, the Josephson effect is dominated by mesoscopic fluctuations. In this regime, the system realizes a phi 0 unction with sample- specific phi 0and critical current. Cooper pair splitting between the two arms plays a major role and leads to 2 Phi(0) periodicity of the current as a function of flux between the arms. We calculate the current and its flux and polarization dependence for the three types of magnetic links.