Local thermal fluctuations in current-carrying superconducting nanowires

被引：4
|
作者：
Semenov, Alexej D. [1 ]
Sidorova, Mariia [1 ]
Skvortsov, Mikhail A. [2 ,3 ]
Kuzmin, Artem [4 ]
Ilin, Konstantin [4 ]
Siegel, Michael [4 ]
机构：
[1] German Aerosp Ctr DLR, Inst Opt Sensor Syst, Rutherfordstr 2, D-12489 Berlin, Germany
[2] Skolkovo Inst Sci & Technol, Moscow 121205, Russia
[3] LD Landau Inst Theoret Phys, Chernogolovka 142432, Russia
[4] Karlsruher Inst Technol KIT, Inst Micro & Nanoelektronc Syst IMS, D-76187 Karlsruhe, Germany
来源：
PHYSICAL REVIEW B | 2020年 / 102卷 / 18期
基金：
俄罗斯科学基金会;
关键词：
Compendex;
D O I：
10.1103/PhysRevB.102.184508
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
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页数：12
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