II.1 Magnesium diboride and the two-band scenario

EXACT SOLUTION OF TWO-BAND SUPERCONDUCTIVITY IN ULTRASMALL GRAINS
  • Hiroyuki Kawabe
  • Hidemi Nagao
  • Sergei P. Kruchinin
Conference paper
Part of the NATO Science Series book series (NAII, volume 241)

Abstract

We investigate two-band superconductivity in ultrasmall grain. The Richardson’s exact solution is extended to two-band systems, and a new coupled equation is derived according to the procedure of Richardson’s works. Parity gap and condensation energy of ultrasmall two-band superconducting grain are numerically obtained by solving the coupled equations. We discuss these properties in ultrasmall grain in relation to the correlation, interband interaction, and size dependence.

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Copyright information

© Springer 2007

Authors and Affiliations

  • Hiroyuki Kawabe
    • 1
  • Hidemi Nagao
    • 2
  • Sergei P. Kruchinin
    • 3
  1. 1.Department of Social Work, Faculty of Social WorkKinjo UniversityKasamaJapan
  2. 2.Division of Mathematical and Physical Science, Graduate School of Natural Science and TechnologyKanazawa UniversityKakuma, KanazawaJapan
  3. 3.Bogolyubov Institute for Theoretical PhysicsThe Ukrainian National Academy of ScienceKievUkraine

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