Cooper-pair tunneling in small junctions with tunable Josephson coupling

Yuichi Harada, Hideaki Takayanagi, Arkadi A. Odintsov

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We investigate Cooper-pair tunneling in a circuit consisting of two dc-superconducting quantum interference devices in series, with a gate capacitively coupled to the central island. Measurements cover a wide range of values of the ratio between Josephson coupling energy (Formula presented) and charging energy (Formula presented). The (Formula presented) ratio dependence of the supercurrent is well described by the orthodox theory provided that strong fluctuations of the Josephson phase due to the electromagnetic environment are taken into account. Our data can be interpreted in terms of squeezing of the charge fluctuations with decreasing (Formula presented) ratio.

Original languageEnglish
Pages (from-to)6608-6613
Number of pages6
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume54
Issue number9
DOIs
Publication statusPublished - 1996
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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