Scaling of the conductivity in icosahedral Al-Pd-Re metallic samples - art. no. 094203

Citation
J. Delahaye et C. Berger, Scaling of the conductivity in icosahedral Al-Pd-Re metallic samples - art. no. 094203, PHYS REV B, 6409(9), 2001, pp. 4203
Citations number
40
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
0163-1829 → ACNP
Volume
6409
Issue
9
Year of publication
2001
Database
ISI
SICI code
0163-1829(20010901)6409:9<4203:SOTCII>2.0.ZU;2-E
Abstract
Temperature dependence of electrical conductivity sigma is investigated for a set of icosahedral (i-) Al70.5Pd21Re8.5 samples. We focus on ribbon samp les with resistance ratios R=rho (4 K)/rho (300 K) below similar or equal t o 20. We show these samples are on the metallic side of a metal-insulator t ransition. We analyze our sigma (T) data between 400 mK and 300 K with the one-parameter scaling theory of the Mott-Anderson metal-insulator transitio n. To the best of our knowledge. this is the first overall approach coverin g all the metallic samples of this system and a large temperature range up to 300 K. This interpretation highlights the relevance of the critical regi me close to the metal-insulator transition, regime that is characterized by an inelastic scattering length smaller than the metallic correlation lengt h xi. Consequences for insulating i-Al-Pd-Re samples are also discussed.