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arXiv · 1609.01234

Cooper pair splitting in diffusive magnetic SQUIDs

P. A. Ioselevich·P. M. Ostrovsky·Ya. V. Fominov·M. V. Feigelman
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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 realises a $φ_0$ junction with sample-dependent $φ_0$ and critical current. Cooper pair splitting between the two arms plays a major role and leads to $2Φ_0$ 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.

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P. A. Ioselevich, P. M. Ostrovsky, Ya. V. Fominov, M. V. Feigelman. 2018-04-02. Cooper pair splitting in diffusive magnetic SQUIDs. https://doi.org/10.1103/physrevb.95.094508

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