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

Triplet proximity effect in superconducting heterostructures with a half-metallic layer

Résumé

We present the Usadel theory describing the superconducting proximity effect in heterostructures with a half-metallic layer. It is shown that the full spin polarization inside the half-metals gives rise to the giant triplet spin-valve effect in superconductor (S) – ferromagnet (F) – half-metal (HM) trilayers as well as to the ϕ0-junction formation in the S/F/HM/F/S systems. In addition, we consider the exactly solvable model of the S/F/HM trilayers of atomic thickness and demonstrate that it reproduces the main features of the spin-valve effect found within the Usadel approach. Our results are shown to be in a qualitative agreement with the recent experimental data on the spin-valve effect in MoGe/Cu/Ni/CrO2 hybrids [A. Singh et al., Phys. Rev. X 5, 021019 (2015)].
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Dates et versions

hal-01235033 , version 1 (27-11-2015)

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Sergei V. Mironov, Alexandre I. Buzdin. Triplet proximity effect in superconducting heterostructures with a half-metallic layer. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2015, 92 (18), pp.184506 (1-11). ⟨10.1103/PhysRevB.92.184506⟩. ⟨hal-01235033⟩

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