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Metal-insulator transition in PF6 doped polypyrrole: Failure of disorder-only models

Martens, HCF and Brom, HB and Menon, R (2001) Metal-insulator transition in PF6 doped polypyrrole: Failure of disorder-only models. In: Physical Review B, 64 (20). pp. 1102-1.

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Official URL: http://prb.aps.org/abstract/PRB/v64/i20/e201102


The free-carrier scattering time and plasma frequency in PF6 doped polypyrrole near the metal-insulator transition (MIT) is obtained by dielectric spectroscopy (8-700 GHz) down to 2 K. The specific T-dependence allows us to quantify the distance to the MIT for both metallic and insulating samples. The evolution of the free-carrier parameters when going deeper into the metallic regime conflicts with both the homogeneous and heterogeneous disorder models. We suggest this failure to stem from the interplay between electronic correlations and interchain charge transfer, which is not explicitly considered in these theories.

Item Type: Journal Article
Publication: Physical Review B
Publisher: American Physical Society
Additional Information: Copyright of this article belongs to American Physical Society.
Keywords: Conducting Polypyrrole;Low-Temperature;Transport;Polymers;Systems;Driven
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 04 Feb 2010 04:56
Last Modified: 19 Sep 2010 04:55
URI: http://eprints.iisc.ac.in/id/eprint/17162

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