Superconductivity in W 5SiB 2 with the T 2-phase structure studied by the specific heat measurement and band structure calculation

M. Fukuma, K. Kawashima, M. Maruyama, Jun Akimitsu

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Abstract

The superconducting state of W 5SiB 2 with the T 2-phase structure has been investigated by a specific heat measurement and a density of state calculation. The estimated ΔC p/γT c and 2Δ(0)/k BT c values are 1.49 and 3.32, which are close to 1.43 and 3.53 within the weak coupling regime. The electronic specific heat data clearly indicates the absence of gap nodes in the superconducting order parameter, suggesting an isotropic s-wave superconductor. From the density of state calculations, we found that W d-orbital plays an important role for the superconductivity in W 5SiB 2.

Original languageEnglish
Pages (from-to)714-716
Number of pages3
JournalPhysica C: Superconductivity and its Applications
Volume471
Issue number21-22
DOIs
Publication statusPublished - Nov 2011
Externally publishedYes

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Keywords

  • DOS
  • Specific heat
  • Superconductor
  • W SiB

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Electronic, Optical and Magnetic Materials

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