Sub-gap conductance in ferromagnetic-superconducting mesoscopic structures

Abstract

We study the sub-gap conductance of a ferromagnetic mesoscopic region attached to a ferromagnetic and a superconducting electrode by means of tunnel junctions. In the absence of the exchange field, the ratio $r=\gamma /{\epsilon }_T$ of the two tunnel junction resistances determines the behaviour of the sub-gap conductance which possesses a zero-bias peak for $r\gg 1$ and for $r\ll 1$ a peak at finite voltage. We show that the inclusion of the exchange field leads to a peak splitting for $r\ll 1$, while it shifts the zero-bias anomaly to finite voltages for $r\gg 1$.

5 pages revtex

References in corpus (3)

• Superconducting proximity effect in a mesoscopic ferromagnetic wire
• Long-Range Coherence in a Mesoscopic Metal near a Superconducting Interface
• Phase Dependent Thermopower in Andreev Interferometers

Cited by in corpus (12)

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• Resonant peak in the density of states in the normal metal / diffusive ferromagnet / superconductor junctions
• Andreev current enhancement and subgap conductance of superconducting hybrid structures in the presence of a small spin-splitting field
• Tunneling conductance in Superconductor/Ferromagnet junctions: a self consistent approach
• Spin resolved Andreev reflection in ferromagnet-superconductor junctions with Zeeman splitting
• Spin-polarized proximity effect in superconducting junctions
• Resonant transmission of normal electrons through Andreev states in ferromagnets
• Excess current in ferromagnet-superconductor structures with fully polarized triplet component
• Phase separation and proximity effects in itinerant ferromagnet-superconductor heterostructures