Transport and optical conductivity in NaxWO3

Authors
Ruzicka, B Brglez, A Malic, B Degiorgi, L Mihailovic, D
Citation
B. Ruzicka et al., Transport and optical conductivity in NaxWO3, EUR PHY J B, 16(2), 2000, pp. 205-208
Citations number
14
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
EUROPEAN PHYSICAL JOURNAL B
ISSN journal
14346028 → ACNP
Volume
16
Issue
2
Year of publication
2000
Pages
205 - 208
Database
ISI
SICI code
1434-6028(200007)16:2<205:TAOCIN>2.0.ZU;2-H
Abstract
We present the results of a de transport and optical investigation of WO3 a nd NaxWO3 with x = 0.01. Upon Na-doping we find a (Drude) metallic componen t in the optical conductivity, while the transport data display a crossover from an activated to a variable range hopping regime around 210 K. We sugg est the possible formation of polarons (and bipolarons) and speculate that superconductivity could be induced, provided the de percolation threshold i s achieved.