Abstract
We report a systematic experimental study of the superconducting resistive transition in one-dimensional Al wires of length 0.6 to 110 \ensuremath{\mu}m. Shorter wires show a peak in resistance as a function of temperature near ${\mathit{T}}_{\mathit{c}}$, with a value above the normal-state resistance. Near the peak, the resistance decreases sharply in a magnetic field of only a few Oe. In the same regime, the current-voltage characteristic resembles that of a superconductor-insulator-normal tunnel junction. These new results may be a manifestation of coherent effects in small superconducting samples.
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