Interference of nonequilibrium quasiparticles in a superconductor

K. Yu Arutyunov*, T. T. Hongisto, J. P. Pekola

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

We have observed an interference of nonequilibrium quasiparticles, injected from a copper electrode into an aluminium loop through a tunnel barrier. At temperatures below 1K the tunnel current at fixed voltage bias is periodically modulated by external magnetic field. The amplitude of the modulation reaches maximum at a bias slightly below the gap energy, and decreases with the further increase of the bias voltage. For a given voltage bias the amplitude of the current oscillations decreases with increase of the temperature and the loop circumference.

Original languageEnglish
Pages (from-to)1429-1430
Number of pages2
JournalPhysica B: Condensed Matter
Volume329-333
Issue numberPart 2
DOIs
Publication statusPublished - May 2003
MoE publication typeA1 Journal article-refereed

Keywords

  • Interference
  • Nanostructures
  • Nonequilibrium superconductivity
  • Quasiparticles

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