Temperature Variation of the dc Josephson Current in Pb-Pb Tunnel Junctions

1970 ◽  
Vol 2 (6) ◽  
pp. 1651-1656 ◽  
Author(s):  
C. S. Lim ◽  
J. D. Leslie ◽  
H. J. T. Smith ◽  
P. Vashishta ◽  
J. P. Carbotte
Keyword(s):  
Temperature Variation ◽  
Tunnel Junctions ◽  
Josephson Current

Josephson current in ferromagnet-superconductor tunnel junctions

2002 ◽  
Vol 65 (13) ◽  
Author(s):  
Xiaowei Li ◽  
Zhiming Zheng ◽  
D. Y. Xing ◽  
Guoya Sun ◽  
Zhengchao Dong
Keyword(s):  
Tunnel Junctions ◽  
Josephson Current

Josephson Current and Proximity Effect in Niobium-Based Tunnel Junctions

1981 ◽  
Vol 20 (3) ◽  
pp. 639-646 ◽  
Author(s):  
Natsuki Mori ◽  
Hiroyuki Inahata ◽  
Hajime Ozaki
Keyword(s):  
Proximity Effect ◽  
Tunnel Junctions ◽  
Josephson Current

Hydrogen-impurity-induced conductance peaks in constriction type Josephson junctions

2021 ◽  
Author(s):  
Kazuki Miyakawa ◽  
Hiroki Takata ◽  
Taishi Yamaguchi ◽  
Yuji Inagaki ◽  
Kazumasa Makise ◽  
...  
Keyword(s):  
Temperature Variation ◽  
Josephson Junctions ◽  
Andreev Reflection ◽  
Josephson Current ◽  
Differential Conductance ◽  
Superconducting Gap ◽  
Impurity Effects ◽  
Hydrogen Impurity ◽  
Multiple Andreev Reflection

Abstract We studied hydrogen (H) and deuterium (D) impurity effects of superconducting Josephson current flowing through the superconductor-constriction-superconductor Josephson junctions (ScS-JJ). When H or D impurities are adsorbed on the surface of the ScS-JJ prepared by niobium (Nb) or lead (Pb), many spike-like peaks with almost the same spacing appear inside the superconducting gap in addition to anomalies owing to the multiple Andreev reflection in the differential conductance spectra. The spacing between the adjacent peaks is independent of the temperature variation. These indicate that H or D impurities adsorbed on the JJ are sources of noise for the Josephson current.

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