Abstract
We report the first experimental results obtained by low-temperature scanning-electron microscopy on the spatial distribution of the maximum Josephson current in tunnel junctions. The experiments were performed with a nearly one-dimensional PbIn-PbBi window junction, its length being large compared to ${\ensuremath{\lambda}}_{\mathrm{J}}$. The spatial resolution is 1-2 \ensuremath{\mu}m and is governed by the thermal healing length. In a parallel magnetic field the different vortex states have been clearly observed. The nonlocal effects due to the beam-induced change of the phase-difference function predicted by Chang et al. have also been confirmed.
Published Version
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