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Applied Physics A Solids and Surfaces
We report on an experiment of tunneling through an externally-adjustable vacuum-tunnel barrier. This allowed the first observation of a continuous exponential dependence of the current on tunnel distance with a resolution of about 0.2 Å. © 1982.
Jean-Pierre Locquet, Christoph Gerber, et al.
Applied Physics A Solids and Surfaces
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Applied Physics Letters