Cooper-pair tunneling in small junctions with tunable Josephson coupling

Yuichi Harada; Hideaki Takayanagi; Arkadi A. Odintsov

doi:10.1103/PhysRevB.54.6608

Cooper-pair tunneling in small junctions with tunable Josephson coupling

Yuichi Harada, Hideaki Takayanagi, Arkadi A. Odintsov

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	6608-6613
Number of pages	6
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	54
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.54.6608
Publication status	Published - 1996
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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year = "1996",

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AU - Takayanagi, Hideaki

AU - Odintsov, Arkadi A.

PY - 1996

Y1 - 1996

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AB - 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.

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Cooper-pair tunneling in small junctions with tunable Josephson coupling

Abstract

All Science Journal Classification (ASJC) codes

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