Two pairing parameters in superconducting grains

M. Schechter, J. Von Delf, Y. Imry, Y. Levinson

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Unlike bulk superconductivity, where one energy scale, the energy gap, characterizes pairing correlations, we show that in small superconducting grains there exist two different such quantities. The first characterizes collective properties of the grain, such as the condensation energy, and the second single-particle properties. To describe these two energy scales, we define two corresponding pairing parameters, and show that although both reduce to the bulk gap for large grains, this occurs at different size scales.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number6
StatePublished - 27 Feb 2003
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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