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- W1990369005 abstract "We argue that the negative magnetoresistance of superconducting nanowires, which was observed in recent experiments, can be explained by the influence of an external magnetic field on the critical current of the phase slip process. We show that suppression of the order parameter in bulk superconductors made by an external magnetic field can lead to an enhancement of both the first ${I}_{c1}$ and second ${I}_{c2}$ critical currents of the phase slip process in nanowires. Another mechanism of an enhancement of ${I}_{c1}$ can come from decreasing the decay length of the charge imbalance ${ensuremath{lambda}}_{Q}$ at weak magnetic fields because ${I}_{c1}$ is inversely proportional to ${ensuremath{lambda}}_{Q}$. We show that both mechanisms of the enhancement of the first critical current originate from the enhancement of the intrinsic dissipation of the phase slip process. That effect leads to a suppression of the rate of the thermoactivated (and probably quantum fluctuated) phase slips and results in decreasing the fluctuated resistance." @default.
- W1990369005 created "2016-06-24" @default.
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- W1990369005 date "2007-05-21" @default.
- W1990369005 modified "2023-09-27" @default.
- W1990369005 title "Negative magnetoresistance and phase slip process in superconducting nanowires" @default.
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- W1990369005 doi "https://doi.org/10.1103/physrevb.75.184517" @default.
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