Field Dependence of Electronic Specific Heat in Two-Band Superconductors

Noriyuki Nakai, Masanori Ichioka, Kazushige Machida

    Research output: Contribution to journalArticlepeer-review

    82 Citations (Scopus)

    Abstract

    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
    Volume71
    Issue number1
    DOIs
    Publication statusPublished - Jan 2002

    Keywords

    • 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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