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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2010

Long ranged singlet proximity effect in ferromagnetic nanowires

Résumé

Recently a long ranged superconductor/ferromagnet (S/F) proximity effect has been reported in Co crystalline nanowires [1, Nature, 6 389 (2010)]. Since the authors of [1] take care to avoid the existence of magnetic domains, the triplet character of the long ranged proximity effect is improbable. Here we demonstrate that in the one-dimensional ballistic regime the standard singlet S/F proximity effect becomes long ranged. We provide an exact solution for the decay of the superconducting correlations near critical temperature ($T_{c}$) and for arbitrary impurities concentration. In particular we find a specific regime, between the diffusive and ballistic ones, where the decay length is simply the electronic mean-free path. Finally possible experiments which could permit to elucidate the nature of the observed long ranged proximity effect in Co nanowires are discussed.

Dates et versions

hal-00539049 , version 1 (23-11-2010)

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Citer

François Konschelle, Jérôme Cayssol, Alexandre I. Buzdin. Long ranged singlet proximity effect in ferromagnetic nanowires. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2010, 82, pp.180509. ⟨10.1103/PhysRevB.82.180509⟩. ⟨hal-00539049⟩

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