High efficiency Andreev reflection observed in Nb/Fe0.5Si0.5/Nb Josephson junctions

2004 ◽  
Vol 404 (1-4) ◽  
pp. 395-399 ◽  
Author(s):  
Ondrej Vávra ◽  
Š. Gaži ◽  
I. Vávra ◽  
J. Dérer ◽  
E. Kováčová
Keyword(s):  
Josephson Junctions ◽  
Andreev Reflection ◽  
High Efficiency

scholarly journals Crossed Andreev reflection in InSb flake Josephson junctions

2019 ◽  
Vol 1 (3) ◽  
Author(s):  
Folkert K. de Vries ◽  
Martijn L. Sol ◽  
Sasa Gazibegovic ◽  
Roy L. M. op het Veld ◽  
Stijn C. Balk ◽  
...  
Keyword(s):  
Josephson Junctions ◽  
Andreev Reflection ◽  
Crossed Andreev Reflection

Multiple Andreev reflection in MgB2/MgO/MgB2 Josephson junctions

2012 ◽  
Vol 100 (12) ◽  
pp. 122601 ◽  
Author(s):  
Ke Chen ◽  
Daniel Cunnane ◽  
Yi Shen ◽  
X. X. Xi ◽  
Alan W. Kleinsasser ◽  
...  
Keyword(s):  
Josephson Junctions ◽  
Andreev Reflection ◽  
Multiple Andreev Reflection

scholarly journals Doppler shift in Andreev reflection from a moving superconducting condensate in Nb/InAs Josephson junctions

2009 ◽  
Vol 80 (22) ◽  
Author(s):  
F. Rohlfing ◽  
G. Tkachov ◽  
F. Otto ◽  
K. Richter ◽  
D. Weiss ◽  
...  
Keyword(s):  
Doppler Shift ◽  
Josephson Junctions ◽  
Andreev Reflection ◽  
Superconducting Condensate

scholarly journals All-spinel oxide Josephson junctions for high-efficiency spin filtering

2017 ◽  
Vol 30 (1) ◽  
pp. 015804 ◽  
Author(s):  
S Mesoraca ◽  
S Knudde ◽  
D C Leitao ◽  
S Cardoso ◽  
M G Blamire
Keyword(s):  
Josephson Junctions ◽  
High Efficiency ◽  
Spinel Oxide ◽  
Spin Filtering

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.

scholarly journals Low temperature characterization of high efficiency spin-filter Josephson junctions

2020 ◽  
Vol 233 ◽  
pp. 05007
Author(s):  
Roberta Caruso ◽  
Halima Giovanna Ahmad ◽  
Avradeep Pal ◽  
Giovanni Piero Pepe ◽  
Davide Massarotti ◽  
...  
Keyword(s):  
Low Temperature ◽  
Josephson Junctions ◽  
High Efficiency ◽  
Cooper Pairs ◽  
Spin Filter ◽  
Wide Range ◽  
Ferromagnetic Nature ◽  
Consistent Picture ◽  
Super Conducting

The interplay between superconducting and ferromagnetic order pa¬rameters in S/F interfaces gives rise to a wide range of peculiar properties with applications in high-efficiency computation and in the emerging field of super¬conducting spintronics. In NbN/GdN/NbN Josephson junctions, GdN barriers give unique properties due to the double insulting and ferromagnetic nature of the material, as demonstrated in previous works. Here we focus on tunneling spectroscopy of these junctions down to 0.3 K when changing the barrier thick¬ness, which contributes to complete a consistent picture on the physics of these junctions and supports the previous indications of equal-spin Cooper pairs con¬tributing to the total supercurrent of the devices.

scholarly journals High-efficiency thermal switch based on topological Josephson junctions

2017 ◽  
Vol 19 (2) ◽  
pp. 023056 ◽  
Author(s):  
Björn Sothmann ◽  
Francesco Giazotto ◽  
Ewelina M Hankiewicz
Keyword(s):  
Josephson Junctions ◽  
High Efficiency ◽  
Thermal Switch
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