Cooper-Pair Tunneling in Small Josephson Junction Arrays Under Radio-Frequency Irradiation

The influence of radio-frequency microwaves on the Coulomb blockade characteristics in small Josephson junctions was studied using a one-dimensional array of ten small Al tunnel junctions in the frequency range from 1 to 1000 MHz. Coulomb blockade voltage ( V th ) is diminished with increasing micro...

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Bibliographic Details
Published in:Journal of low temperature physics 2020, Vol.201 (3-4), p.269-284
Main Authors: Kanyolo, Godwill Mbiti, Takeda, Kouichi, Mizugaki, Yoshinao, Kato, Takeo, Shimada, Hiroshi
Format: Article
Language:English
Subjects:
Arrays
Characterization and Evaluation of Materials
Circuits
Condensed Matter Physics
Cooper pairs
Frequency ranges
Josephson junctions
Low temperature environments
Low temperature physics
Magnetic fields
Magnetic Materials
Magnetism
Microwaves
Physics
Physics and Astronomy
Tunnel junctions
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Summary:The influence of radio-frequency microwaves on the Coulomb blockade characteristics in small Josephson junctions was studied using a one-dimensional array of ten small Al tunnel junctions in the frequency range from 1 to 1000 MHz. Coulomb blockade voltage ( V th ) is diminished with increasing microwave power ( V ac ), where the V th – V ac plots for varied frequencies fall on a single curve. We observed and theoretically analyzed a magnetic field dependent renormalization of the applied microwave power, in addition to a magnetic field independent renormalization effect explained using an effective circuit approach of the array. Due to its high sensitivity to microwave power, the array is well-suited for on-chip detection applications in low-temperature environments.
ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-020-02486-3