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Characterization of anomalous pair currents in Josephson junction networks (Articolo in rivista)

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Characterization of anomalous pair currents in Josephson junction networks (Articolo in rivista) (literal)

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Ottaviani, Ivano; Lucci, Massimiliano; Menditto, R.; Merlo, Vittorio; Salvato, Matteo; Cirillo, Matteo; Müller, Franz E H; Weimann, Thomas; Castellano, Maria Gabriella; Chiarello, Fabio; Torrioli, Guido; Russo, Roberto R. (2014)
Characterization of anomalous pair currents in Josephson junction networks
in Journal of physics. Condensed matter (Print)
(literal)

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Ottaviani, Ivano; Lucci, Massimiliano; Menditto, R.; Merlo, Vittorio; Salvato, Matteo; Cirillo, Matteo; Müller, Franz E H; Weimann, Thomas; Castellano, Maria Gabriella; Chiarello, Fabio; Torrioli, Guido; Russo, Roberto R. (literal)

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Universita degli Studi di Roma Tor Vergata; Physikalisch-Technische Bundesanstalt; Institute for Photonics and Nanotechnologies, Rome; Istituto di Cibernetica Eduardo Caianiello; CNR-SPIN Institute (literal)

Titolo

Characterization of anomalous pair currents in Josephson junction networks (literal)

Abstract

Measurements performed on superconductive networks shaped in the form of planar graphs display anomalously large currents when specific branches are biased. The temperature dependences of these currents evidence that their origin is due to Cooper pair hopping through the Josephson junctions connecting the superconductive islands of the array. The experimental data are discussed in terms of theoretical models which predict, for the system under consideration, an inhomogeneous Cooper pair distribution on the superconductive islands of the network as a consequence of a Bose-Einstein condensation phenomenon. © 2014 IOP Publishing Ltd. (literal)

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