Carrier Dynamics in Conducting Polymers: Case of $PF_6$ Doped Polypyrrole

Romijn, IG and Hupkes, HJ and Martens, HCF and Brom, HB and Mukherjee, AK and Menon, R (2003) Carrier Dynamics in Conducting Polymers: Case of $PF_6$ Doped Polypyrrole. In: Physical Review Letters, 90 (17). 176602-1-4.

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Abstract

The carrier dynamics in $PF-^{6}$ 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.

Item Type:	Journal Article
Publication:	Physical Review Letters
Publisher:	The American Physical Society
Additional Information:	Copyright of this article belongs to The American Physical Society.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	12 Dec 2008 06:08
Last Modified:	19 Sep 2010 04:53
URI:	http://eprints.iisc.ac.in/id/eprint/16727

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