Influence of Disorder on Superconducting Correlations in Nanoparticles

Titelangaben

Croitoru, Mikhail D. ; Shanenko, A. A. ; Vagov, Alexei ; Vasenko, A. S. ; Milošević, M. V. ; Axt, Vollrath Martin ; Peeters, F. M.:
Influence of Disorder on Superconducting Correlations in Nanoparticles.
In: Journal of Superconductivity and Novel Magnetism. Bd. 29 (2016) Heft 3 . - S. 605-609.
ISSN 1557-1947
DOI: https://doi.org/10.1007/s10948-015-3319-8

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Abstract

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.