Cooper pair splitting in diffusive magnetic SQUIDs
P. A. Ioselevich, P. M. Ostrovsky, Ya. V. Fominov, M. V. Feigel'man
DOI 10.1103/PhysRevB.95.094508 · Physical Review B
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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 realizes a φ0 junction with sample-specific φ0 and critical current. Cooper pair splitting between the two arms plays a major role and leads to 2Φ0 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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