Superconductivity and lattice dynamics of granular tin

S. Akselrod*, M. Pasternak, S. Bukshpan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The superconducting transition temperature was measured in samples of 45-Å Sn grains embedded in a tin oxide matrix. The Debye temperature of the same samples was measured by the Mössbauer effect in119Sn in order to detect possible changes in the phonon spectrum. It was found that Tc is enhanced by 10% and γ is decreased by 4% relative to the bulk. Both trends are found to fit quantitatively with McMillan's theory of strong-coupling superconductors. The microstructure and the chemical composition of the samples were thoroughly studied by electron microscopy and the Mössbauer hyperfine interaction. Several conclusions were derived on the nature of the grains and their interaction with the dielectric coating.

Original languageEnglish
Pages (from-to)375-383
Number of pages9
JournalJournal of Low Temperature Physics
Issue number3-4
StatePublished - Nov 1974


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