Resistive transitions in ultrathin superconducting films: Possible evidence for quantum tunneling of vortices
Y. Liu, D. B. Haviland, L. I. Glazman, A. M. Goldman
DOI 10.1103/PhysRevLett.68.2224 · Physical Review Letters
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Abstract
Unusual temperature dependence of electrical resistance has been observed in ultrathin superconducting films of Pb, Al, and Bi. In small magnetic fields, at low temperatures, sheet resistances varied with temperature as R≊R0 exp(T/T0), where T0 and R0 are constants. This result is not expected in conventional models of vortex motion involving thermal activation. On the other hand, it may be explained in a quantum tunneling picture.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.62 | Pressure not reported | midpoint |
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.27 | Pressure not reported | midpoint |
| Bi Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.04 | Pressure not reported | midpoint |
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