Superconductivity in ternary silicide NaAlSi with layered diamond-like structure

S. Kuroiwa, H. Kawashima, H. Kinoshita, H. Okabe, J. Akimitsu

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


We have succeeded in synthesizing a new member of ternary silicide NaAlSi with a superconducting transition temperature Tc-onset = 7 K by high pressure technique. The crystal structure of NaAlSi is the layered diamond-like structure with a space group of P4/nmm (no. 129, Z = 3) and without inversion symmetry. The superconducting properties in NaAlSi have been investigated by means of DC and AC magnetic susceptibility measurements. These magnetic responses indicate that NaAlSi belongs to a conventional type-II superconductor with a Ginzbrug-Landau parameter κ = 13.8. From the band structure calculations, we found that the hole band of Si p- and electron Al s-orbitals play an important role for the superconductivity in this system.

Original languageEnglish
Pages (from-to)11-15
Number of pages5
JournalPhysica C: Superconductivity and its applications
Issue number1-2
Publication statusPublished - Nov 1 2007
Externally publishedYes


  • NaAlSi
  • Superconductivity
  • Ternary silicide
  • Type-II superconductor

ASJC Scopus subject areas

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


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