AI Article Synopsis
- The study investigates how superconducting nanowires switch between superconductive and resistive states due to phase-slip fluctuations and examines the mean switching time using a master-equation approach.
- The analysis reveals that as temperature decreases, the distribution of switching currents first broadens before finally narrowing at lower temperatures, challenging traditional expectations for thermally activated phase slips.
- Interestingly, the research identifies a specific temperature and current range where a single phase-slip event can trigger switching by causing local heating, despite multiple phase-slip events usually being required.
Article Abstract
We study the stochastic dynamics of superconductive-resistive switching in hysteretic current-biased superconducting nanowires undergoing phase-slip fluctuations. We evaluate the mean switching time using the master-equation formalism, and hence obtain the distribution of switching currents. We find that as the temperature is reduced this distribution initially broadens; only at lower temperatures does it show the narrowing with cooling naively expected for phase slips that are thermally activated. We also find that although several phase-slip events are generally necessary to induce switching, there is an experimentally accessible regime of temperatures and currents for which just one single phase-slip event is sufficient to induce switching, via the local heating it causes.
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| http://dx.doi.org/10.1103/PhysRevLett.101.207001 | DOI Listing |
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