| Autor: |
Romijn IG; Kamerlingh Onnes Laboratory, Leiden University, P.O. Box 9504, 2300 RA Leiden, The Netherlands., Hupkes HJ, Martens HC, Brom HB, Mukherjee AK, Menon R |
| Jazyk: |
angličtina |
| Zdroj: |
Physical review letters [Phys Rev Lett] 2003 May 02; Vol. 90 (17), pp. 176602. Date of Electronic Publication: 2003 Apr 29. |
| DOI: |
10.1103/PhysRevLett.90.176602 |
| Abstrakt: |
The carrier dynamics in PF6 doped polypyrrole has been probed by dielectric spectroscopy (from 10(-4) to 4 eV), down to 4.2 K. The phase-sensitive sub-THz data have assisted to resolve the discrepancies in Kramers-Kronig analysis in earlier studies. Even in metallic samples, just 1% of the carriers are delocalized, at 300 K; the fraction drops down considerably as a function of disorder, carrier density, and temperature. This subtle metallic feature and the anomalies in carrier dynamics are attributed to coherent and incoherent transport between short conjugated segments. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
|
