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

6 Citations (Scopus)

2 Downloads (Pure)

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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title = "High quality superconducting tunnel junctions on Nb and Ta single crystals for radiation detection",

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

U2 - 10.1063/1.119865

DO - 10.1063/1.119865

M3 - Article

SN - 0003-6951

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SP - 1252

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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