SUPERCONDUCTING TUNNEL-JUNCTIONS ON NB-SINGLE AND TA-SINGLE CRYSTAL SUBSTRATES FOR X-RAY SPECTROMETRY

Authors
BRUIJN MP KIEWIET FB VANDENBERG ML LUITEN OJ DEKORTE PAJ BRONS CGS HAMSTER AW FLOKSTRA J
Citation
Mp. Bruijn et al., SUPERCONDUCTING TUNNEL-JUNCTIONS ON NB-SINGLE AND TA-SINGLE CRYSTAL SUBSTRATES FOR X-RAY SPECTROMETRY, IEEE transactions on applied superconductivity, 7(2), 1997, pp. 3387-3390
Citations number
11
Categorie Soggetti
Engineering, Eletrical & Electronic","Physics, Applied
Journal title
IEEE transactions on applied superconductivity → ACNP
ISSN journal
10518223
Volume
7
Issue
2
Year of publication
1997
Part
3
Pages
3387 - 3390
Database
ISI
SICI code
1051-8223(1997)7:2<3387:STONAT>2.0.ZU;2-S
Abstract
We present the first high quality Nb/Al-based tunnel junctions, fabric ated with a superconducting interface onto single crystal substrates o f 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 ultrasmooth crys tal surfaces are described.