Physics – Condensed Matter – Superconductivity
Scientific paper
2006-12-10
Phys. Rev. B 74, 220504(R) (2006)
Physics
Condensed Matter
Superconductivity
5 pages, 2 figures
Scientific paper
10.1103/PhysRevB.74.220504
The theory of the I-V characteristics in diffusive superconductor/weak ferromagnet/superconductor (SFS) junction is developed. We show that the exchange field $h$ of the ferromagnet manifests itself as an additional conductance peak at $eV \sim \Delta+h$ in the phase-coherent regime, when the Thouless energy is of the order of superconducting order parameter. The excess current exhibits non-monotonous dependence on the exchange field and non-trivial temperature behavior, which is strongly influenced by the temperature dependence of the exchange field.
Bobkov A. M.
Bobkova I. V.
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