Evidence for Macroscopic Quantum Tunneling in One-Dimensional Superconductors
N. Giordano
DOI 10.1103/PhysRevLett.61.2137 · Physical Review Letters
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Abstract
Measurements of the superconducting-to-normal transition in very-small-diameter In wires are presented. The results are discussed in terms of the currently accepted theory, in which dissipation below Tc is attributed to thermally activated motion of the Ginzburg-Landau order parameter over the free-energy barriers which separate metastable states. This theory is consistent with our results for temperatures within about 0.2 K of Tc, but at lower temperatures it fails qualitatively. We suggest that the low-temperature behavior is dominated by quantum-mechanical tunneling through the free-energy barrier, and show that our results are consistent with this picture.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| In Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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