Resistance anomaly near the superconducting transition temperature in short aluminum wires
P. Santhanam, C. C. Chi, S. J. Wind, M. J. Brady, J. J. Bucchignano
DOI 10.1103/PhysRevLett.66.2254 · Physical Review Letters
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Abstract
We report a systematic experimental study of the superconducting resistive transition in one-dimensional Al wires of length 0.6 to 110 μm. Shorter wires show a peak in resistance as a function of temperature near Tc, 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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.3 | Pressure not reported | onset |
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