High quality superconducting tunnel junctions on Nb and Ta single crystals for radiation detection

M.P. Bruijn; F.B. Kiewiet; M.L. van den Berg; O.J. Luiten; P.A.J. de Korte; A.W. Hamster; G.C.S. Brons; J. Flokstra

doi:10.1063/1.119865

High quality superconducting tunnel junctions on Nb and Ta single crystals for radiation detection

M.P. Bruijn, F.B. Kiewiet, M.L. van den Berg, O.J. Luiten, P.A.J. de Korte, A.W. Hamster, G.C.S. Brons, J. Flokstra

Faculty of Science and Technology

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

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Abstract

High quality Nb/Al-based tunnel junctions, fabricated with a superconducting interface onto thick single crystalx-ray absorbers of Nb and Ta are discussed. Current-voltage characteristics, recorded at 0.5 K, show a subgap current which is still dominated by thermally excited quasiparticles. The quality parameter Rsubgap/Rnormal reaches a value of several million, which is unequalled for nonepitaxially sputtered tunnel junctions. The fabrication process and some development steps, such as preparation of ultrasmooth crystal surfaces are described. Observations of x-ray photons absorbed in Nb and Tasingle crystals detected by the superconducting tunnel junctions are also presented.

Original language	English
Pages (from-to)	1252-1254
Number of pages	3
Journal	Applied physics letters
Volume	71
Issue number	9
DOIs	https://doi.org/10.1063/1.119865
Publication status	Published - 1997

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10.1063/1.119865

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abstract = "High quality Nb/Al-based tunnel junctions, fabricated with a superconducting interface onto thick single crystalx-ray absorbers of Nb and Ta are discussed. Current-voltage characteristics, recorded at 0.5 K, show a subgap current which is still dominated by thermally excited quasiparticles. The quality parameter Rsubgap/Rnormal reaches a value of several million, which is unequalled for nonepitaxially sputtered tunnel junctions. The fabrication process and some development steps, such as preparation of ultrasmooth crystal surfaces are described. Observations of x-ray photons absorbed in Nb and Tasingle crystals detected by the superconducting tunnel junctions are also presented.",

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T1 - High quality superconducting tunnel junctions on Nb and Ta single crystals for radiation detection

AU - Bruijn, M.P.

AU - Kiewiet, F.B.

AU - van den Berg, M.L.

AU - Luiten, O.J.

AU - de Korte, P.A.J.

AU - Hamster, A.W.

AU - Brons, G.C.S.

AU - Flokstra, J.

PY - 1997

Y1 - 1997

N2 - High quality Nb/Al-based tunnel junctions, fabricated with a superconducting interface onto thick single crystalx-ray absorbers of Nb and Ta are discussed. Current-voltage characteristics, recorded at 0.5 K, show a subgap current which is still dominated by thermally excited quasiparticles. The quality parameter Rsubgap/Rnormal reaches a value of several million, which is unequalled for nonepitaxially sputtered tunnel junctions. The fabrication process and some development steps, such as preparation of ultrasmooth crystal surfaces are described. Observations of x-ray photons absorbed in Nb and Tasingle crystals detected by the superconducting tunnel junctions are also presented.

AB - High quality Nb/Al-based tunnel junctions, fabricated with a superconducting interface onto thick single crystalx-ray absorbers of Nb and Ta are discussed. Current-voltage characteristics, recorded at 0.5 K, show a subgap current which is still dominated by thermally excited quasiparticles. The quality parameter Rsubgap/Rnormal reaches a value of several million, which is unequalled for nonepitaxially sputtered tunnel junctions. The fabrication process and some development steps, such as preparation of ultrasmooth crystal surfaces are described. Observations of x-ray photons absorbed in Nb and Tasingle crystals detected by the superconducting tunnel junctions are also presented.

KW - n/a OA procedure

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DO - 10.1063/1.119865

M3 - Article

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EP - 1254

JO - Applied physics letters

JF - Applied physics letters

IS - 9

ER -

High quality superconducting tunnel junctions on Nb and Ta single crystals for radiation detection

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