Journal
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
Volume 29, Issue 3, Pages 605-609Publisher
SPRINGER
DOI: 10.1007/s10948-015-3319-8
Keywords
Superconductivity; Nanoscale; Electron-phonon interaction
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Funding
- Belgian Science Policy (BELSPO Back to Belgium Grant)
- Flemish Science Foundation (FWO-Vl)
- Methusalem Foundation of the Flemish Government
- TOPBOF-UA
- bilateral project CNPq-FWO-Vl
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We investigate how the interplay of quantum confinement and level broadening caused by disorder affects superconducting correlations in ultra-small metallic grains. We use the electron-phonon interaction-induced electron mass renormalization and the reduced static-path approximation of the BCS formalism to calculate the critical temperature as a function of the grain size. We show how the strong electron-impurity scattering additionally smears the peak structure in the electronic density of states of a metallic grain and imposes additional limits on the critical temperature under strong quantum confinement.
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