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Effect of elastic strain and stress on the superconducting transition temperature of quench-condensed films

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Zeitschrift für Physik B Condensed Matter

Abstract

The volume dependence of the superconducting transition temperatureT c of amorphous and highly disordered films is investigated by bending the film substrate. The volume coefficientd InT c /d InV of annealed Sn and Pb films agrees with the volume coefficient known from hydrostatic pressure experiments. This bending technique is applied to superconducting modifications which can be produced only by quench condensation onto a substrate at liquid helium temperature. Amorphous films such as Bi, Ga, Sn90Cu10 and PbxBi1−x, as well as highly disordered Sn and Pb films, are investigated. The relations found between the volume coefficient, the electron-phonon coupling constant λ and the Grüneisen parameter γ G are in reasonable agreement with the volume dependence ofT c for non-transition metals, obtained on the basis of the McMillan equation. In particular, the results represent an expansion of this kind of investigation to very strong-coupling superconductors.

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Dedicated to Prof. Dr. W. Buckel on the occasion of his 60th birthday

Paper based in part on a Habilitationsschrift submitted to the Fakultät für Physik, Universität Karlsruhe (TH)

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Müller, W.H.G. Effect of elastic strain and stress on the superconducting transition temperature of quench-condensed films. Z. Physik B - Condensed Matter 38, 49–58 (1980). https://doi.org/10.1007/BF01321202

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  • DOI: https://doi.org/10.1007/BF01321202

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