Magnetic-flux periodic response of nanoperforated ultrathin superconducting films
M. D. Stewart, Jr., Zhenyi Long, James M. Valles, Jr., Aijun Yin, J. M. Xu
DOI 10.1103/PhysRevB.73.092509 · Physical Review B
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Abstract
We have patterned ultrathin Bi∕Sb films with a hexagonal array of nanoscale holes. These regular perforations result in a phase-sensitive periodic response to an applied magnetic field. Thus by measuring this response in the resistive transitions we are able to distinguish between superconducting fluctuations of the amplitude and phase. Our results delineate three distinct portions of the R(T) in which fluctuations of the amplitude, both the amplitude and phase, and the phase of the superconducting order parameter dominate. In addition, as Tc0 is lowered the region of the superconducting transition dominated by amplitude fluctuations is large and grows with proximity to the superconductor to insulator transition.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5 | Pressure not reported | onset |
| Bi Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.65 | Pressure not reported | onset |
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