"Superconductor-Insulator Transition" in a Single Josephson Junction

J. S. Penttilä*, Ü. Parts, P. J. Hakonen, M. A. Paalanen, E. B. Sonin

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

88 Citations (Scopus)
111 Downloads (Pure)

Abstract

VI curves of resistively shunted single Josephson junctions with different capacitances and tunneling resistances are found to display a crossover between two types of VI curves: one without and another with a resistance bump (negative second derivative) at zero bias. The crossover corresponds to the dissipative phase transition (superconductor-insulator transition) at which macroscopic quantum tunneling delocalizes the Josephson phase and destroys superconductivity. Our measured phase diagram does not agree with the diagram predicted by the original theory, but does coincide with a theory that takes into account the accuracy of voltage measurements and thermal fluctuations.

Original languageEnglish
Pages (from-to)1004-1007
Number of pages4
JournalPhysical Review Letters
Volume82
Issue number5
DOIs
Publication statusPublished - 1 Feb 1999
MoE publication typeA1 Journal article-refereed

Keywords

  • Josephson junction
  • quantum tunneling
  • superconductor

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