Physical Review B, volume 102, issue 21, publication number 214506
Long- to short-junction crossover and field-reentrant critical current in Al/Ag-nanowires/Al Josephson junctions
A. Murani
1, 2
,
S. Sengupta
1, 3
,
A. Kasumov
1, 4
,
R Deblock
1
,
Caroline Celle
5
,
Jean Pierre Simonato
5
,
H. Bouchiat
1
,
H Bouchiat
1
,
S. Guéron
1
1
Laboratoire Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, 91405 Orsay, France
|
2
Quantronics Group, Service de Physique de l'Etat Condensé (CNRS UMR 3680), IRAMIS, CEA-Saclay, 91191 Gif-sur-Yvette, France
|
3
Université Paris-Saclay, CNRS/IN2P3, IJClab, 91405 Orsay, France
|
Publication type: Journal Article
Publication date: 2020-12-16
Journal:
Physical Review B
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor: 3.7
ISSN: 24699950, 24699969, 10980121, 1550235X
Abstract
We have probed the superconducting proximity effect through long high-quality monocrystalline Ag nanowires, by realizing Josephson junctions of different lengths, with different superconducting materials. Thanks to the high number of junctions probed, both the contact resistance and electron diffusion constant could be determined, enabling a comparison of the measured critical current to theoretical expectation, over the entire regime from short to long diffusive junction. Although the length dependence of the critical current is as expected, the amplitude of the $R_{N}I_c$ product is smaller than predicted by theory. We also address the magnetic field dependence of the critical current. The quasi-gaussian decay of the critical current with field expected of a long narrow junction is observed for all superconducting contacts we used except for aluminum. We present the striking non-monotonous effect of field on the critical current of junctions with aluminum contacts, and analyze it in terms of improved quasiparticle thermalization by a magnetic field.
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1 publication, 16.67%
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Murani A. et al. Long- to short-junction crossover and field-reentrant critical current in Al/Ag-nanowires/Al Josephson junctions // Physical Review B. 2020. Vol. 102. No. 21. 214506
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Murani A., Sengupta S., Kasumov A., Deblock R., Celle C., Simonato J. P., Bouchiat H., Bouchiat H., Guéron S. Long- to short-junction crossover and field-reentrant critical current in Al/Ag-nanowires/Al Josephson junctions // Physical Review B. 2020. Vol. 102. No. 21. 214506
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TY - JOUR
DO - 10.1103/physrevb.102.214506
UR - https://doi.org/10.1103/physrevb.102.214506
TI - Long- to short-junction crossover and field-reentrant critical current in Al/Ag-nanowires/Al Josephson junctions
T2 - Physical Review B
AU - Murani, A.
AU - Sengupta, S.
AU - Kasumov, A.
AU - Deblock, R
AU - Celle, Caroline
AU - Simonato, Jean Pierre
AU - Bouchiat, H.
AU - Guéron, S.
AU - Bouchiat, H
PY - 2020
DA - 2020/12/16
PB - American Physical Society (APS)
IS - 21
VL - 102
SN - 2469-9950
SN - 2469-9969
SN - 1098-0121
SN - 1550-235X
ER -
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@article{2020_Murani,
author = {A. Murani and S. Sengupta and A. Kasumov and R Deblock and Caroline Celle and Jean Pierre Simonato and H. Bouchiat and S. Guéron and H Bouchiat},
title = {Long- to short-junction crossover and field-reentrant critical current in Al/Ag-nanowires/Al Josephson junctions},
journal = {Physical Review B},
year = {2020},
volume = {102},
publisher = {American Physical Society (APS)},
month = {dec},
url = {https://doi.org/10.1103/physrevb.102.214506},
number = {21},
doi = {10.1103/physrevb.102.214506}
}