2004/07/31 by R. Mélin, D. Feinberg · 2 citations
Materials Science · Mathematics · Physics and Astronomy · #Andreev reflection #Condensed matter physics #Conductance #Ferromagnetism #Magnetic and transport properties of perovskites and related materials #Magnetic properties of thin films #Mathematics #Phase (matter) #Physics #Physics of Superconductivity and Magnetism #Planar #Quantum mechanics #Reflection (computer programming) #Sign (mathematics) #Superconductivity #cond-mat.mes-hall #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.70.174509
published as Phys. Rev. B 70, 174509 (2004) · 9 pages, 7 figures
arxiv created 2004/09/08 · openalex publication_date 2004/11/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Crossed conductance in hybrid ferromagnet/superconductor/ferromagnet (FSF) structures results from the competition between normal transmission and Andreev reflection channels. Crossed Andreev reflection (CAR) and elastic cotunneling (EC) between the ferromagnets are dressed by local Andreev reflections, which play an important role for transparent enough interfaces and intermediate spin polarizations. This modifies the simple result previously obtained at lowest order, and can explain the sign of the crossed resistances in a recent experiment [D. Beckmann et al., cond-mat/0404360]. This holds both in the multiterminal hybrid structure model (where phase averaging over the Fermi oscillations is introduced ``by hand'' within the approximation of a single nonlocal process) and for infinite planar interfaces (where phase averaging naturally results in the microscopic solution with multiple nonlocal processes).