rf power dependence of subharmonic voltage spectra of two-dimensional Josephson-junction arrays

Journal Article · Sun Feb 28 23:00:00 EST 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.47.5190· OSTI ID:6652770

Hebboul, S E; Garland, J C ^[1]

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1. Physics Department, Ohio State University, Columbus, Ohio 43210 (United States)

We have measured the rf-bias-current dependence of the [nu]/2 subharmonic spectral response of planar 300[times]300 Nb-Au-Nb proximity-coupled Josephson-junction arrays. The [nu]/2 subharmonic voltage spectrum was examined at two rf-bias frequencies, [nu]/[nu][sub [ital c]][approx]1.4, 2.0 ([nu][sub [ital c]][approx]120 MHz), and in applied magnetic fields corresponding to [ital f]=0,1/2 flux quantum per plaquette. The measurements were compared to analytical predictions for an rf-biased asymmetric superconducting quantum interference device with non-negligble loop inductance and large rf-bias-current amplitudes, based on the resistively shunted Josephson-junction model. Reasonable agreement was found between experiment and theory, suggesting that a possible origin for the observed subharmonic behavior in arrays involves an interplay between array plaquette inductances and junction critical-current variations.

• DOE Contract Number: FG02-90ER45427
• OSTI ID: 6652770
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 47:9; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELEMENTS
FREQUENCY RANGE
GOLD
JOSEPHSON JUNCTIONS
JUNCTIONS
MAGNETIC FIELDS
METALS
MHZ RANGE
MHZ RANGE 100-1000
NIOBIUM
RF SYSTEMS
SPECTRAL RESPONSE
SUPERCONDUCTING JUNCTIONS
TRANSITION ELEMENTS