Control of Coulomb blockade in a mesoscopic Josephson junction using single electron tunneling

J. Hassel, H. Seppä, J. Delahaye, P. Hakonen

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Abstract

We study a circuit where a mesoscopic Josephson junction (JJ) is embedded in an environment consisting of a large bias resistor and a normal-insulator-superconductor (NIS) junction. The effective Coulomb blockade of the JJ can be controlled by the tunneling current through the NIS junction leading to transistor-like characteristics. We show using phase correlation theory and numerical simulations that substantial current gain with low current noise (in≲1 fA/Hz⎯⎯⎯⎯⎯√) and noise temperature (≲0.1 K) can be achieved. Good agreement between our numerical simulations and experimental results is obtained.
Original languageEnglish
Pages (from-to)8059-8062
Number of pages4
JournalJournal of Applied Physics
Volume95
Issue number12
DOIs
Publication statusPublished - 2004
MoE publication typeA1 Journal article-refereed

Keywords

  • Coulomb blockade
  • Josephson junction
  • normal-insulator-superconductor

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