Ac and dc properties of Josephson-junction arrays with long-range interaction

Journal Article · Fri Jan 01 00:00:00 EST 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.47.975· OSTI ID:7175151

Sohn, L L; Tuominen, M T; Rzchowski, M S; Free, J U; Tinkham, M ^[1]

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1. Department of Physics and Division of Applied Sciences, Harvard University, Cambridge, Massachusetts 02138 (United States)

We present an experimental investigation of arrays with long-range interaction, together with a model to explain observed deviations from the predictions of earlier theoretical work. These arrays consist of [ital N] horizontal and [ital N] vertical superconducting filaments arranged in two parallel planes separated by an oxide layer, so that every wire is Josephson coupled to every other wire in the array as nearest- or next-nearest neighbors. We have performed ac-susceptibility and dc-transport measurements on both ordered and disordered arrays. Our ac measurements show a strong feature at a temperature [ital T][sub [ital c]], which we interpret as a transition to the macroscopically phase-coherent state. We find that this feature is field dependent in ordered arrays, but not in disordered arrays. dc-transport measurements reveal that these arrays have unexpectedly low critical currents and show voltage steps in their [ital I]-[ital V] curves; moreover, they are [ital hysteretic] despite the fact that they consist of [ital nonhysteretic] junctions. Our analysis of these results shows that the finite ratio of the wire inductance to the Josephson inductance cannot be ignored since it limits the effective number of Josephson junctions along a wire to [ital N][sub [ital e][ital f][ital f]][much lt][ital N].

• OSTI ID: 7175151
• Journal Information: Physical Review, B: Condensed Matter; (United States), Vol. 47:2; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
JOSEPHSON JUNCTIONS
ELECTRICAL PROPERTIES
AC SYSTEMS
CRITICAL TEMPERATURE
DC SYSTEMS
FILAMENTS
MAGNETIC FIELDS
JUNCTIONS
PHYSICAL PROPERTIES
POWER SYSTEMS
SUPERCONDUCTING JUNCTIONS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
665412* - Superconducting Devices- (1992-)