Control of switching between metastable superconducting states in δ-MoN nanowires

Jože Buh, Viktor Kabanov, Vladimir Baranov, Aleš Mrzel, Andrej Kovič and Dragan Mihailovic ()
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Jože Buh: Jozef Stefan Institute
Viktor Kabanov: Jozef Stefan Institute
Vladimir Baranov: University of Antwerp
Aleš Mrzel: Jozef Stefan Institute
Andrej Kovič: Jozef Stefan Institute
Dragan Mihailovic: Jozef Stefan Institute

Nature Communications, 2015, vol. 6, issue 1, 1-6

Abstract: Abstract The superconducting state in one-dimensional nanosystems is very delicate. While fluctuations of the phase of the superconducting wave function lead to the spontaneous decay of persistent supercurrents in thin superconducting wires and nanocircuits, discrete phase-slip fluctuations can also lead to more exotic phenomena, such as the appearance of metastable superconducting states in current-bearing wires. Here we show that switching between different metastable superconducting states in δ-MoN nanowires can be very effectively manipulated by introducing small amplitude electrical noise. Furthermore, we show that deterministic switching between metastable superconducting states with different numbers of phase-slip centres can be achieved in both directions with small electrical current pulse perturbations of appropriate polarity. The observed current-controlled bi-stability is in remarkable agreement with theoretically predicted trajectories of the system switching between different limit cycle solutions of a model one-dimensional superconductor.

Date: 2015
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms10250

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DOI: 10.1038/ncomms10250

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