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 language | English |
|---|---|
| Pages (from-to) | 11-15 |
| Number of pages | 5 |
| Journal | Physica C: Superconductivity and its applications |
| Volume | 466 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - Nov 1 2007 |
| Externally published | Yes |
Keywords
- 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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Cite this
Kuroiwa, S., Kawashima, H., Kinoshita, H., Okabe, H., & Akimitsu, J. (2007). Superconductivity in ternary silicide NaAlSi with layered diamond-like structure. Physica C: Superconductivity and its applications, 466(1-2), 11-15. https://doi.org/10.1016/j.physc.2007.04.232