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Regular version of the site

Article

Influence of Disorder on Superconducting Correlations in Nanoparticles

Croitoru M., Shanenko A., Vagov A., Vasenko A.S., Milošević M., Axt V., Peeters F.

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.