Measurement of the spatial distribution of the maximum Josephson current in superconducting tunnel junctions

Journal Article · Sat Aug 01 04:00:00 EDT 1987 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00683901· OSTI ID:5915296

Bosch, J; Gross, R; Koyanagi, M; Huebener, R P

The spatial distribution of the maximum Josephson current density J/sub max/ is imaged in quasi-one-dimensional in-line tunnel junctions by scanning the junction surface with an electron beam and by recording the beam-induced change of I/sub max/ as a function of the coordinates of the beam focus. In addition to the modulation of the Josephson current density for the different vortex states, the nonlocal effect resulting from the beam-induced change of the phase-difference function is observed. The results are in good agreement with the theoretical predictions. The electron beam scanning technique also serves well for imaging inhomogeneities in the barrier or in the electrodes of the junction.

• Research Organization: Universitaet Tuebingen, West Germany
• OSTI ID: 5915296
• Journal Information: J. Low Temp. Phys.; (United States), Journal Name: J. Low Temp. Phys.; (United States) Vol. 68:3-4; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BEAM OPTICS
BEAMS
BOUNDARY CONDITIONS
CONTROL EQUIPMENT
CRYOSTATS
CURRENT DENSITY
CURRENTS
DISTRIBUTION
ELECTRIC CURRENTS
ELECTRODES
ELECTRON BEAMS
ELECTRON MICROSCOPES
ELECTRON MICROSCOPY
ELECTRON SCANNING
ENERGY GAP
EQUIPMENT
FOCUSING
JOSEPHSON EFFECT
JUNCTIONS
LEPTON BEAMS
MICROSCOPES
MICROSCOPY
PARTICLE BEAMS
PHASE SHIFT
SCANNING ELECTRON MICROSCOPY
SPATIAL DISTRIBUTION
SUPERCONDUCTING JUNCTIONS
TEMPERATURE DEPENDENCE
THERMOSTATS
TUNNEL EFFECT