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Effect of Specimen Thickness on the Superconducting Critical Temperature of Indium
Phys. Rev. B 3, 85 – Published 1 January, 1971
DOI: https://doi.org/10.1103/PhysRevB.3.85
Abstract
The superconducting critical temperature () is found to decrease inversely proportional to the boundary-limited mean free path (mfp) for thin single-crystal and polycrystal In plates. Since the boundary-limited mfp is not linearly related to specimen thickness for the sample thicknesses used (5-250 μm), these results are a stronger confirmation of the Markowitz-Kadanoff calculations than previously reported in the literature. The In results contrast with similar experiments using Ga single crystals reported by Gregory in which no mfp effect was observed. Possible reasons for this difference are discussed. The possible use of measurements such as these to determine the anisotropic-pairing interaction is discussed.
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