Local thermal fluctuations in current-carrying superconducting nanowires
Alexej D. Semenov, Mariia Sidorova, Mikhail A. Skvortsov, Artem Kuzmin, Konstantin Ilin, Michael Siegel
DOI 10.1103/PhysRevB.102.184508 · Physical Review B
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Abstract
We analyze the effect of different types of fluctuations in internal electron energy on the rates of dark and photon counts in straight current-carrying superconducting nanowires. Dark counts appear due to thermal fluctuations in statistically independent cells with the effective size of the order of the coherence length; each count corresponds to an escape from the equilibrium state through an appropriate saddle point. For photon counts, spectral broadening of the deterministic cutoff in the spectra of the detection efficiency can be phenomenologically explained by local thermal fluctuations in the electron energy within cells with the same effective volume as for dark counts.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NbN Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11.8 | Pressure not reported | midpoint |
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