Superconducting tunnel junctions on Nb- and Ta-single crystal substrates for X-ray spectrometry

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

doi:10.1109/77.622102

Superconducting tunnel junctions on Nb- and Ta-single crystal substrates for X-ray spectrometry

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

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Abstract

We present the first high quality Nb/Al-based tunnel junctions, fabricated with a superconducting interface onto single crystal substrates of Nb and Ta. Current-voltage measurements down to 1.4 K show a subgap current which is dominated by thermal excitation of quasiparticles, no ohmic or superconducting leakages could be observed. The fabrication process and development steps, such as preparation of ultra-smooth crystal surfaces are described.

Original language	English
Pages (from-to)	3387-3390
Number of pages	4
Journal	IEEE transactions on applied superconductivity
Volume	7
Issue number	2
DOIs	https://doi.org/10.1109/77.622102
Publication status	Published - 1997

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10.1109/77.622102

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abstract = "We present the first high quality Nb/Al-based tunnel junctions, fabricated with a superconducting interface onto single crystal substrates of Nb and Ta. Current-voltage measurements down to 1.4 K show a subgap current which is dominated by thermal excitation of quasiparticles, no ohmic or superconducting leakages could be observed. The fabrication process and development steps, such as preparation of ultra-smooth crystal surfaces are described.",

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author = "M.P. Bruijn and F. Kiewiet and {van den Berg}, M.L. and O.J. Luiten and {de Korte}, P.A.J. and G.C.S. Brons and A.W. Hamster and J. Flokstra",

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T1 - Superconducting tunnel junctions on Nb- and Ta-single crystal substrates for X-ray spectrometry

AU - Bruijn, M.P.

AU - Kiewiet, F.

AU - van den Berg, M.L.

AU - Luiten, O.J.

AU - de Korte, P.A.J.

AU - Brons, G.C.S.

AU - Hamster, A.W.

AU - Flokstra, J.

PY - 1997

Y1 - 1997

N2 - We present the first high quality Nb/Al-based tunnel junctions, fabricated with a superconducting interface onto single crystal substrates of Nb and Ta. Current-voltage measurements down to 1.4 K show a subgap current which is dominated by thermal excitation of quasiparticles, no ohmic or superconducting leakages could be observed. The fabrication process and development steps, such as preparation of ultra-smooth crystal surfaces are described.

AB - We present the first high quality Nb/Al-based tunnel junctions, fabricated with a superconducting interface onto single crystal substrates of Nb and Ta. Current-voltage measurements down to 1.4 K show a subgap current which is dominated by thermal excitation of quasiparticles, no ohmic or superconducting leakages could be observed. The fabrication process and development steps, such as preparation of ultra-smooth crystal surfaces are described.

KW - n/a OA procedure

U2 - 10.1109/77.622102

DO - 10.1109/77.622102

M3 - Article

SN - 1051-8223

VL - 7

SP - 3387

EP - 3390

JO - IEEE transactions on applied superconductivity

JF - IEEE transactions on applied superconductivity

IS - 2

ER -

Superconducting tunnel junctions on Nb- and Ta-single crystal substrates for X-ray spectrometry

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