Size-dependent anisotropic diamagnetic screening in superconducting Sn nanowires
T. G. Sorop, L. J. de Jongh
DOI 10.1103/PhysRevB.75.014510 · Physical Review B
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Abstract
We present orientation dependent magnetic measurements on ordered arrays of parallel Sn nanowires for diameters D≈6–170nm. For D⩾50nm clear superconducting transitions could be detected below Tc=3.7K attributed to superconductivity of the individual nanowires. Decreasing the wire diameters from bulk values to 50nm strongly reduces the diamagnetism (by a factor of 104) and enhances the critical field by a factor of 45. For magnetic fields parallel and perpendicular to the wire axis we detect an anisotropy in the diamagnetic screening that is enhanced with decreasing D far above the Ginzburg-Landau prediction. This behavior is attributed to size-dependent anisotropy in the electronic mean free path.
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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