Fractional giant Shapiro steps and spatially correlated phase motion in 2D Josephson arrays

Journal Article · Sun Feb 04 23:00:00 EST 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.64.693· OSTI ID:7196208

Benz, S P; Rzchowski, M S; Tinkham, M; Lobb, C J ^[1]

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

We have applied radio-frequency signals to 1000 by 1000 arrays of Josephson junctions and observed giant Shapiro steps at voltages 1000 times that expected for a single junction. When a perpendicular magnetic field is applied, {ital fractional} giant steps appear at voltages directly related to the number of flux quanta per unit cell. A phenomenological model is proposed that utilizes the spatial arrangement of the vortices in a superlattice relative to the underlying array to explain these novel steps.

• OSTI ID: 7196208
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 64:6; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

426001* -- Engineering-- Superconducting Devices & Circuits-- (1990-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSOLUTE ZERO TEMPERATURE
AMPLITUDES
ARRAY PROCESSORS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
FILMS
GROUND STATES
JOSEPHSON JUNCTIONS
JUNCTIONS
MAGNETIC FIELDS
MAGNETIC FLUX
MATHEMATICAL MODELS
PHYSICAL PROPERTIES
RADIATIONS
RADIOWAVE RADIATION
SIGNALS
SUPERCONDUCTING FILMS
SUPERCONDUCTING JUNCTIONS
SUPERLATTICES
ULTRALOW TEMPERATURE