Investigation of low-temperature I-V curves of high-quality Nb/Al-AlOx/Nb Josephson junctions
- 15 February 1992
- journal article
- conference paper
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 71 (4) , 1888-1892
- https://doi.org/10.1063/1.351175
Abstract
A detailed experimental temperature dependence of the subgap current of high‐quality Nb/Al‐AlOx/Nb Josephson tunnel junctions is reported. The presence of a pronounced current rise at V≂Δ/e is observed. Comparison with the theoretical model for two‐particle tunneling is performed, but a substantial disagreement is found. At V<Δ/e the measured current is in remarkably good agreement with the single particle tunneling predictions down to 2 K.This publication has 13 references indexed in Scilit:
- Characterization of different types of Nb-AlO/sub x/ based Josephson tunnel junctionsIEEE Transactions on Magnetics, 1991
- Ultra-high quality Nb/AlO/sub x//Nb tunnel junctions with epitaxial base layersIEEE Transactions on Magnetics, 1991
- Characteristics of Nb-based Josephson junctions at a temperature below 1 KIEEE Transactions on Magnetics, 1989
- Fabrication of Nb/Al-Al/sub 2/O/sub 3//Nb junctions with extremely low leakage currentsIEEE Transactions on Magnetics, 1989
- Aspects of dissipation effects in experiments on macroscopic quantum tunnelling in Josephson junctionsIl Nuovo Cimento D, 1989
- Theories of subharmonic gap structures in superconducting junctionsPhysical Review B, 1974
- Excess Currents in Superconducting Tunnel JunctionsPhysical Review B, 1968
- Tunneling Between SuperconductorsPhysical Review Letters, 1963
- Excess Currents in Electron Tunneling Between SuperconductorsPhysical Review Letters, 1963
- Two-Particle Tunneling Processes Between SuperconductorsPhysical Review Letters, 1963