Effect of the critical current density and the junction size on the leakage current of Nb/Al-AlOx/Nb superconducting tunnel junctions for radiation detection

Koen Joosse, Hiroshi Nakagawa, Hiroshi Akoh, Susumu Takada, Keisuke Maehata, Kenji Ishibashi

研究成果: ジャーナルへの寄稿記事

12 引用 (Scopus)

抄録

Nb/Al-AlOx/Nb superconducting tunnel junctions (STJ's) designed for X-ray detection have been fabricated. The behavior of the low-temperature subgap leakage current, which severely limits the energy resolution obtained in such devices, is investigated. From trends in the dependence of the leakage currents on the critical current density and the size of the STJ, as well as from the low-temperature current-voltage characteristics, and an analysis of the base electrode surface morphology, it is concluded that physical defects in the barrier region are the most probable cause of the leakage currents. Suggestions are given for optimization of the device processing.

元の言語英語
ページ(範囲)2633-2637
ページ数5
ジャーナルJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
35
発行部数5 SUPPL. A
出版物ステータス出版済み - 5 1 1996

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Tunnel junctions
tunnel junctions
Leakage currents
critical current
leakage
current density
Radiation
radiation
Current voltage characteristics
Surface morphology
suggestion
X rays
Temperature
Defects
Electrodes
Processing
trends
optimization
electrodes
causes

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

これを引用

Effect of the critical current density and the junction size on the leakage current of Nb/Al-AlOx/Nb superconducting tunnel junctions for radiation detection. / Joosse, Koen; Nakagawa, Hiroshi; Akoh, Hiroshi; Takada, Susumu; Maehata, Keisuke; Ishibashi, Kenji.

:: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, 巻 35, 番号 5 SUPPL. A, 01.05.1996, p. 2633-2637.

研究成果: ジャーナルへの寄稿記事

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AU - Takada, Susumu

AU - Maehata, Keisuke

AU - Ishibashi, Kenji

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