http://www.cnr.it/ontology/cnr/individuo/prodotto/ID18771
Inhomogeneous superconductivity in comb-shaped Josephson Junction Networks (Articolo in rivista)
- Type
- Label
- Inhomogeneous superconductivity in comb-shaped Josephson Junction Networks (Articolo in rivista) (literal)
- Anno
- 2006-01-01T00:00:00+01:00 (literal)
- Alternative label
P. Sodano, A. Trombettoni, P. Silvestrini, R. Russo, and B. Ruggiero (2006)
Inhomogeneous superconductivity in comb-shaped Josephson Junction Networks
in New journal of physics
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- P. Sodano, A. Trombettoni, P. Silvestrini, R. Russo, and B. Ruggiero (literal)
- Pagina inizio
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Progetto Lagrange, Fondazione CRT e Fondazione I.S.I. c/o Dipartimento di Fisica-Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino I-10124, Italy
Dipartimento di Fisica and Sezione INFN, Università di Perugia, Via A. Pascoli, Perugia I-06123, Italy
Dipartimento d'Ingegneria dell'Informazione, Seconda Universitádi Napoli, Aversa, Italy
Istituto di Cibernetica 'E. Caianiello' del CNR, Pozzuoli, Italy (literal)
- Titolo
- Inhomogeneous superconductivity in comb-shaped Josephson Junction Networks (literal)
- Abstract
- We show that some of the Josephson couplings of junctions arranged
to form an inhomogeneous network undergo a non-perturbative renormalization
provided that the network's connectivity is pertinently chosen. As a result, the
zero-voltage Josephson critical currents I
turn out to be enhanced along directions
selected by the network's topology. This renormalization effect is possible only on
graphs whose adjacency matrix admits a hidden spectrum (i.e. a set of localized
states disappearing in the thermodynamic limit). We provide a theoretical and
experimental study of this effect by comparing the superconducting behaviour of
c
a comb-shaped Josephson junction network and a linear chain made with the same
junctions: we show that the Josephson critical currents of the junctions located
on the comb's backbone are bigger than those of the junctions located on the
chain. Our theoretical analysis, based on a discrete version of the Bogoliubov-de
Gennes equation, leads to results which are in good quantitative agreement with
experimental results. (literal)
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- Autore CNR
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