We present the results of a dc transport and optical investigation of WO3 and NaxWO3 with x = 0:01. Upon Na-doping we nd a (Drude) metallic component in the optical conductivity, while the transport data display a crossover from an activated to a variable range hopping regime around 210 K. We suggest the possible formation of polarons (and bipolarons) and speculate that superconductivity could be induced, provided the dc percolation threshold is achieved.
Transport and optical conductivity in NaxWO3
2000
Abstract
We present the results of a dc transport and optical investigation of WO3 and NaxWO3 with x = 0:01. Upon Na-doping we nd a (Drude) metallic component in the optical conductivity, while the transport data display a crossover from an activated to a variable range hopping regime around 210 K. We suggest the possible formation of polarons (and bipolarons) and speculate that superconductivity could be induced, provided the dc percolation threshold is achieved.File in questo prodotto:
| File | Dimensione | Formato | |
|---|---|---|---|
|
prod_230704-doc_57471.pdf
non disponibili
Descrizione: RUZICKA EPJB16 2000
Dimensione
119.52 kB
Formato
Adobe PDF
|
119.52 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
