Quantum Phase Slips and Superconductivity in Granular Films
Matthew P. A. Fisher
DOI 10.1103/PhysRevLett.57.885 · Physical Review Letters
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Abstract
An explanation is proposed for the recent observation that in ultrathin Sn films there is apparently a universal normal-state sheet resistance above which superconductivity cannot be established. It is demonstrated that when the sheet resistance is larger than the quantum of resistance, RQ=h4e2, the order parameter suffers phase slips due to quantum tunneling driving the film normal at low temperature. This value of the resistance agrees quantitatively with experiment.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Sn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.7 | Pressure not reported | onset |
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