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Amplitude fluctuations driven by the density of electron pairs within nanosize granular structures inside strongly
Sanjib Ghosh1, Sudhansu S Mandal
1Department of Theoretical Physics, Indian Association for the Cultivation of Science, Kolkata 700 032, India.
Abstract:
Motivated by the recent observation of the shell effect in a nanoscale pure superconductor by Bose et al. [Nat. Mater. 9, 550 (2010)], we explore the possible shell-like effect in a strongly disordered superconductor as it is known to produce nanosize superconducting puddles (SPs). We find a remarkable change in the texture of the pairing amplitudes that is responsible for forming the SP, upon monotonic tuning of the average electron density,
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