Metal-nonmetal transition in solid argon-lanthanum mixtures
Abstract
A continuous metal-nonmetal transition is observed in solid ArLa mixtures. The d.c. conductivity σ starts at a La atomic fraction cLa ≅ 0.15 with σ = 2 × 10 -2 [Ω-cm] -1 and increases exponentially with cLa until σ reaches the minimum metallic conductivity σ min = 300 ± 100[Ω-cm] -1 at cLa ≅ 0.4. The temperature dependence of σ shows variable range hopping between localized states for c> La ⪅ 0.4 and metallic behaviour for c La ⪆ 0.4.
- Publication:
-
Solid State Communications
- Pub Date:
- December 1980
- DOI:
- 10.1016/0038-1098(80)90132-5
- Bibcode:
- 1980SSCom..36..881R