Evidence of Collective Charge Behavior in the Insulating State of Ultrathin Films of Superconducting Metals
C. Christiansen, L. M. Hernandez, A. M. Goldman
DOI 10.1103/PhysRevLett.88.037004 · Physical Review Letters
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Abstract
Nonlinear I−V characteristics have been observed in insulating quench-condensed films which are locally superconducting. We suggest an interpretation in terms of the enhancement of conduction by the depinning of a Cooper pair charge density wave, Cooper pair crystal, or Cooper pair glass that may characterize this insulating regime. We propose that this is a more likely description than the Coulomb blockade or charge-anticharge unbinding phenomena.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ga Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.3 | Pressure not reported | onset |
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