Spatial distribution of the maximum Josephson current in superconducting tunnel junctions

Journal Article · Tue Mar 01 04:00:00 EST 1988 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00682159· OSTI ID:6794331

Mannhart, J; Bosch, J; Gross, R; Huebener, R P

The distribution of the maximum Josephson current in two-dimensional tunnel junctions is investigated both theoretically and experimentally. Measurements of the Josephson current density are performed using low-temperature scanning electron microscopy. Josephson current densities are calculated to means of a numerical iteration procedure, which is presented in detail. These theoretical calculations are found to be essential for the correct interpretation of the measured Josephson current densities. Combining these experimental and theoretical methods, we investigate trapped transverse vortices. Further, the strength of the elementary pinning centers acting upon the trapped flux quanta is measured by recording the shift of the vortex position as a function of an applied Lorentz force. Ringlike vortices are also observed, and the influence of different current feed configurations on the Josephson current distribution is investigated.

• Research Organization: Universitaet Tuebingen (West Germany)
• OSTI ID: 6794331
• Journal Information: J. Low Temp. Phys.; (United States), Journal Name: J. Low Temp. Phys.; (United States) Vol. 70:5-6; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104 -- Metals & Alloys-- Physical Properties
360106 -- Metals & Alloys-- Radiation Effects
656002 -- Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-)
656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
BEAMS
CHALCOGENIDES
COMPUTERIZED SIMULATION
COOPER PAIRS
CURRENT DENSITY
CURRENTS
DIRECT CURRENT
DISTRIBUTION
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELECTRON BEAMS
ELECTRON MICROSCOPY
EQUATIONS
FIELD EQUATIONS
FLUX DENSITY
IMAGE PROCESSING
INDIUM ALLOYS
ITERATIVE METHODS
JOSEPHSON EFFECT
JOSEPHSON JUNCTIONS
JUNCTIONS
LEAD ALLOYS
LEPTON BEAMS
MAGNETIC FLUX
MATHEMATICAL MODELS
MICROSCOPY
OXIDES
OXYGEN COMPOUNDS
PARTICLE BEAMS
PHYSICAL PROPERTIES
PHYSICAL RADIATION EFFECTS
PROCESSING
RADIATION EFFECTS
SCANNING ELECTRON MICROSCOPY
SILICON COMPOUNDS
SILICON OXIDES
SIMULATION
SINE-GORDON EQUATION
SPATIAL DISTRIBUTION
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTIVITY
TUNNEL EFFECT