A study of evaporated superconducting weak-link junctions

1970 ◽  
Vol 48 (4) ◽  
pp. 470-476 ◽  
Author(s):  
O. Iwanyshyn ◽  
J. D. Leslie ◽  
H. J. T. Smith
Keyword(s):  
Josephson Junction ◽  
Liquid Helium ◽  
Weak Link ◽  
Simple Theory ◽  
Model Based ◽  
Current Voltage ◽  
Current Variation ◽  
Current Voltage Characteristics ◽  
Zero Voltage

The current–voltage characteristics and voltage oscillations of evaporated, superconducting weak-link junctions have been investigated. The zero-voltage current variation with temperature is shown to be similar to that for a Josephson junction. A simple theory based on part of the superconductor switching normal enables us to explain the voltage snapback. A model based on thermal instabilities due to bubbles in the liquid helium in contact with the junction has been used to explain the voltage oscillations.

Current-voltage characteristics of a four-terminal superconducting weak link

1984 ◽  
Vol 54 (5-6) ◽  
pp. 519-533 ◽  
Author(s):  
Bao-Yi Shi ◽  
Lide Zhang ◽  
Yuan-Dong Dai ◽  
Y. H. Kao
Keyword(s):  
Weak Link ◽  
Current Voltage ◽  
Current Voltage Characteristics

Current–voltage characteristics of a mesoscopic Josephson junction in a low-impedance environment

2005 ◽  
Vol 359-361 ◽  
pp. 1442-1444 ◽  
Author(s):  
Yamaguchi Takahide ◽  
Shinya Uji ◽  
Hisao Miyazaki ◽  
Youiti Ootuka ◽  
Pertti J. Hakonen
Keyword(s):  
Josephson Junction ◽  
Current Voltage ◽  
Current Voltage Characteristics

THEORY OF POINT CONTACT SPECTRA FOR SYSTEM METAL TIP-SUPERCONDUCTOR WITH INTERNAL JOSEPHSON JUNCTION

1989 ◽  
Vol 03 (10) ◽  
pp. 789-794 ◽  
Author(s):  
M. KUPKA ◽  
O. HUDÁK
Keyword(s):  
Josephson Junction ◽  
Energy Gap ◽  
Point Contact ◽  
Model System ◽  
Point Contacts ◽  
Current Voltage ◽  
Current Voltage Characteristics ◽  
Metal Tip ◽  
Contact Metal

We report on the calculations of current-voltage characteristics and dynamical resistivity for a model system (series connected point contact metal — superconductor and Josephson junction of the S-N-S type) as a function of applied voltage. Calculated shape of dV/dI as a function of V shows some qualitative agreement with measured curves on real low-resistivity point contacts of the type metal tip – ceramic superconductor (LaBaCuO, YBaCuO). Method for determination of the energy gap is proposed.

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