Perturbations on the superconducting state of metallic nanoparticles: influence of geometry and impurities

Abstract

The pair condensation energy of a finite-size superconducting particle is studied as a function of two control parameters. The first control parameter is the shape of the particle, and the second parameter is a position-dependent impurity introduced in the particle. Whereas the former parameter is known to induce strong fluctuations in the condensation energy, the latter control parameter is found to be a more gentle probe of the pairing correlations.

Submitted for the special issue of the International Symposium on Small Particles and Inorganic Clusters XVI, at KULeuven (July 8-13, 2012). PACS: 74.78.Na, 74.20.Fg

References in corpus (4)

• Observation of shell effects in superconducting nanoparticles of Sn
• Shell Structure and Strengthening of Superconducting Pair Correlation in Nanoclusters
• Richardson-Gaudin integrability in the contraction limit of the quasispin
• Critical temperature and specific heat for Cooper pairing on a spherical surface