The present investigation explores the spatial distribution of Cooper pair density in graph-shaped arrays of Josephson junctions using a Ginzburg–Landau approach. We specifically investigate double-comb structures and compare their properties with linear arrays as reference systems. Our findings reveal that the peculiar connectivity of the double-comb structure leads to spatial gradients in the order parameter, which can be readily detected through measurements of Josephson critical currents. We present experimental results which indicate the specific dependence of the order parameter on the branches of the graphs and are evidence of the theoretical predictions.

Tomei, E., Bizzi, R., Merlo, V., Romeo, F., Salina, G., Cirillo, M. (2024). Critical Temperature and Critical Current Enhancement in Arrays of Josephson Junctions: A Ginzburg–Landau Perspective. PHYSICS, 6(2), 599-612 [10.3390/physics6020039].

Critical Temperature and Critical Current Enhancement in Arrays of Josephson Junctions: A Ginzburg–Landau Perspective

Tomei, Elena
Formal Analysis
;
Merlo, Vittorio
Methodology
;
Cirillo, Matteo
Writing – Review & Editing
2024-01-01

Abstract

The present investigation explores the spatial distribution of Cooper pair density in graph-shaped arrays of Josephson junctions using a Ginzburg–Landau approach. We specifically investigate double-comb structures and compare their properties with linear arrays as reference systems. Our findings reveal that the peculiar connectivity of the double-comb structure leads to spatial gradients in the order parameter, which can be readily detected through measurements of Josephson critical currents. We present experimental results which indicate the specific dependence of the order parameter on the branches of the graphs and are evidence of the theoretical predictions.
2024
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/03
Settore PHYS-03/A - Fisica sperimentale della materia e applicazioni
English
Con Impact Factor ISI
Josephson effect
solid state condensates
superconductivity
Tomei, E., Bizzi, R., Merlo, V., Romeo, F., Salina, G., Cirillo, M. (2024). Critical Temperature and Critical Current Enhancement in Arrays of Josephson Junctions: A Ginzburg–Landau Perspective. PHYSICS, 6(2), 599-612 [10.3390/physics6020039].
Tomei, E; Bizzi, R; Merlo, V; Romeo, F; Salina, G; Cirillo, M
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/395824
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