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Hotspot dynamics in current carrying WSi superconducting nanowires

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  • F. Marsili
  • M. J. Stevens
  • A. Kozorezov
  • V. B. Verma
  • C. Lambert
  • J. A. Stern
  • R. Horansky
  • S. Dyer
  • M. D. Shaw
  • R. P. Mirin
  • S. W. Nam


We measured the temporal dynamics of optically excited hotspots in current-carrying WSi superconducting nanowires as a function of bias current, temperature and excitation wavelength, observing an unexpected effect: hotspot relaxation depends strongly on bias current.