Superconductivity in ternary silicide NaAlSi with layered diamond-like structure

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

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

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
Volume466
Issue number1-2
DOIs
Publication statusPublished - Nov 1 2007
Externally publishedYes

Fingerprint

Diamond
Superconductivity
Magnetic susceptibility
Band structure
Superconducting materials
Superconducting transition temperature
Diamonds
superconductivity
Crystal structure
diamonds
Electrons
alternating current
direct current
transition temperature
inversions
magnetic permeability
orbitals
crystal structure
symmetry
electrons

Keywords

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

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Superconductivity in ternary silicide NaAlSi with layered diamond-like structure. / Kuroiwa, S.; Kawashima, H.; Kinoshita, H.; Okabe, H.; Akimitsu, Jun.

In: Physica C: Superconductivity and its Applications, Vol. 466, No. 1-2, 01.11.2007, p. 11-15.

Research output: Contribution to journalArticle

Kuroiwa, S. ; Kawashima, H. ; Kinoshita, H. ; Okabe, H. ; Akimitsu, Jun. / Superconductivity in ternary silicide NaAlSi with layered diamond-like structure. In: Physica C: Superconductivity and its Applications. 2007 ; Vol. 466, No. 1-2. pp. 11-15.
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