Hybrid superconductor–ferromagnet transistor-like device

We demonstrate theoretically and experimentally that a ferromagnetic layer as thin as a few nanometres, which is almost transparent for non-superconducting charge transport, can be used as a cut-off filter to block transport of charge-carrier superconducting correlations. This property may be exploi...

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Published in:Superconductor science & technology 2011-02, Vol.24 (2), p.024009-024009
Main Authors: Nevirkovets, I P, Belogolovskii, M A
Format: Article
Language:English
Subjects:
Asymmetry
Charge transport
Devices
Ferromagnetism
Insulators
Superconductivity
Superconductors
Thin films
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description We demonstrate theoretically and experimentally that a ferromagnetic layer as thin as a few nanometres, which is almost transparent for non-superconducting charge transport, can be used as a cut-off filter to block transport of charge-carrier superconducting correlations. This property may be exploited in some applications, as is exemplified by the case of double-barrier S1IS2FIS3 multi-terminal devices (with S, I, and F denoting a superconductor, an insulator, and a ferromagnetic metal, respectively), whose principle of operation is based on a nonequilibrium superconducting state driven by tunnel injection of quasiparticles. Using the F layer makes the device asymmetric and considerably improves input--output isolation in comparison with the formerly investigated symmetric S1IS2IS3 devices.
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source Institute of Physics:Jisc Collections:IOP Publishing Read and Publish 2024-2025 (Reading List)
subjects Asymmetry
Charge transport
Devices
Ferromagnetism
Insulators
Superconductivity
Superconductors
Thin films
title Hybrid superconductor–ferromagnet transistor-like device
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