Article (Scientific journals)
In situ tailoring of superconducting junctions via electro-annealing
Lombardo, Joseph; Jelic, Zeljko; Baumans, Xavier et al.
2018In Nanoscale, 10 (4), p. 1987-1996
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Keywords :
superconductivity; niobium; mesoscopic; electro-annealing; electromigration
Abstract :
[en] We demonstrate the in situ engineering of superconducting nanocircuitry by targeted modulation of material properties through high applied current densities. We show that the sequential repetition of such customized electro-annealing in a niobium (Nb) nanoconstriction can broadly tune the superconducting critical temperature Tc and the normal-state resistance Rn in the targeted area. Once a sizable Rn is reached, clear magneto-resistance oscillations are detected along with a Fraunhofer-like field dependence of the critical current, indicating the formation of a weak link but with further adjustable characteristics. Advanced Ginzburg–Landau simulations fully corroborate this picture, employing the detailed parametrization from the electrical characterization and high resolution electron microscope images of the region within the constriction where the material has undergone amorphization by electro-annealing.
Research center :
CESAM - Complex and Entangled Systems from Atoms to Materials - ULiège
CAREM - Cellule d'Appui à la Recherche et à l'Enseignement en Microscopie - ULiège
Disciplines :
Physics
Author, co-author :
Lombardo, Joseph  ;  Université de Liège - ULiège > Département de physique > Physique expérimentale des matériaux nanostructurés
Jelic, Zeljko ;  Université de Liège - ULiège > Dépatement de Physique > Experimental Physics of Nanostructured Materials
Baumans, Xavier ;  Université de Liège - ULiège > Département de physique > Physique expérimentale des matériaux nanostructurés
Scheerder, Jeroen;  Katholieke Universiteit Leuven - KUL > INPAC - Institute for Nanoscale Physics and Chemistry > Laboratory of Solid-State Physics and Magnetism
Nacenta, Jorge P.;  Centre National de la Recherche Scientifique - CNRS > Université Grenoble-Alpes > Grenoble INP
Moshchalkov, Victor V.;  Katholieke Universiteit Leuven - KUL > Institute for Nanoscale Physics and Chemistry > Laboratory of Solid-State Physics and Chemistry
Kramer, Roman B. G.;  Centre National de la Recherche Scientifique - CNRS > Université Grenoble-Alpes
Van de Vondel, Joris;  Katholieke Universiteit Leuven - KUL > Institute for Nanoscale Physics and Chemistry > Laboratory of Solid-State Physics and Magnetism
Milošević, Milorad V.;  Universiteit Antwerpen - UA > Departement Fysica
Silhanek, Alejandro  ;  Université de Liège - ULiège > Département de physique > Physique expérimentale des matériaux nanostructurés
Language :
English
Title :
In situ tailoring of superconducting junctions via electro-annealing
Alternative titles :
[fr] Ajustement in situ de jonctions supraconductrices par electro-annealing
Publication date :
28 January 2018
Journal title :
Nanoscale
ISSN :
2040-3364
eISSN :
2040-3372
Publisher :
Royal Society of Chemistry Publishing, United Kingdom
Volume :
10
Issue :
4
Pages :
1987-1996
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture [BE]
Available on ORBi :
since 25 January 2018

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