Possibility of Electron Pairing in Small Metallic Nanoparticles

Details Possibility of Electron Pairing in Small Metallic Nanoparticles Possibility of Electron Pairing in Small Metallic Nanoparticles

2010-12-26

arxiv.org/abs/1012.5497v3

Phys. Rev. B 84, 064532 (2011)

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevB.84.064532

We investigate the possibility of electron pairing in small metallic nanoparticles at zero temperature. In these particles both electrons and phonons are mesoscopic, i.e. modified by the nanoparticle's finite size. The electrons, the phonons, and their interaction are described within the framework of a simplified model. The effective electron-electron interaction is derived from the underlying electron-phonon interaction. The effect of both effective interaction and Coulomb interaction on the electronic spectrum is evaluated. Results are presented for aluminum, zinc and potassium nanoparticles containing a few hundred atoms. We find that a large portion of the aluminum and zinc particles exhibit modifications in their electronic spectrum due to pairing correlations, while pairing correlations are not present in the potassium particles.

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