Abstract.
The electronic shell structure in small metallic nanoclusters leads to high level degeneracy, which is strongly beneficial for the appearance of pair correlation. This results in a high value of Tc as well as in the appearance of a superconducting gap which causes a strong modification of the energy spectrum. The electronic energy spectrum becomes strongly temperature dependent. Consequently, specific experiments to demonstrate the presence of pair correlation can be proposed.
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Ovchinnikov, Y., Kresin, V. Strong pair correlation in small metallic nanoclusters: the energy spectrum. Eur. Phys. J. B 47, 333–336 (2005). https://doi.org/10.1140/epjb/e2005-00349-2
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DOI: https://doi.org/10.1140/epjb/e2005-00349-2