Superconductivity in ternary silicide NaAlSi with layered diamond-like structure
✍ Scribed by S. Kuroiwa; H. Kawashima; H. Kinoshita; H. Okabe; J. Akimitsu
- Publisher
- Elsevier Science
- Year
- 2007
- Tongue
- English
- Weight
- 620 KB
- Volume
- 466
- Category
- Article
- ISSN
- 0921-4534
No coin nor oath required. For personal study only.
✦ Synopsis
We have succeeded in synthesizing a new member of ternary silicide NaAlSi with a superconducting transition temperature T cÀonset = 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 j = 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.