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

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 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

Observation of enhanced thermal noise due to multiple Andreev reflection in ballistic InGaAs-based superconducting weak links

2005 ◽  
Vol 86 (13) ◽  
pp. 132505 ◽  
Author(s):  
Tatsushi Akazaki ◽  
Hayato Nakano ◽  
Junsaku Nitta ◽  
Hideaki Takayanagi
Keyword(s):  
Thermal Noise ◽  
Andreev Reflection ◽  
Weak Links ◽  
Multiple Andreev Reflection

Multiple Andreev reflection in hybrid AlGaAs/GaAs structures with superconducting NbN contacts

1999 ◽  
Vol 33 (5) ◽  
pp. 551-554 ◽  
Author(s):  
A. A. Verevkin ◽  
N. G. Ptitsina ◽  
K. V. Smirnov ◽  
B. M. Voronov ◽  
G. N. Gol’tsman ◽  
...  
Keyword(s):  
Andreev Reflection ◽  
Multiple Andreev Reflection

Multiple Andreev-reflection in semiconductor-coupled superconducting weak-links

1994 ◽  
Vol 235-240 ◽  
pp. 1903-1904
Author(s):  
M. Kuhlmann ◽  
U. Zimmermann ◽  
D.A. Dikin ◽  
S. Abens ◽  
K. Keck ◽  
...  
Keyword(s):  
Andreev Reflection ◽  
Weak Links ◽  
Multiple Andreev Reflection

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 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 Evolution of superconducting gaps in Th-substituted Sm1−xThxOFeAs studied by multiple Andreev reflection spectroscopy

2017 ◽  
Vol 95 (9) ◽  
Author(s):  
T. E. Kuzmicheva ◽  
S. A. Kuzmichev ◽  
K. S. Pervakov ◽  
V. M. Pudalov ◽  
N. D. Zhigadlo
Keyword(s):  
Andreev Reflection ◽  
Reflection Spectroscopy ◽  
Multiple Andreev Reflection
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