Field Dependence of Electronic Specific Heat in Two-Band Superconductors

Noriyuki Nakai, Masanori Ichioka, Kazushige Machida

Research output: Contribution to journalArticlepeer-review

84 Citations (Scopus)


The vortex structure is studied in light of MgB2 theoretically based on a two-band superconducting model by means of Bogoliubov-de Gennes framework. The field dependence of the electronic specific heat coefficient γ(H) is focused. The exponent α in γ(H) ∞ H α is shown to become smaller by adjusting the gap ratio of the two gaps on the major and minor bands. The observed extremely small value α ∼ 0.23 could be reasonable in this two-band model with the gap ratio ∼0.3.

Original languageEnglish
Pages (from-to)23-26
Number of pages4
Journaljournal of the physical society of japan
Issue number1
Publication statusPublished - Jan 2002


  • Bogoliubov-de Gennes equations
  • Electronic specific heat coefficient γ(H)
  • MgB
  • Two gaps
  • Two-band superconducting model
  • Vortex structure

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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