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Metal-Insulator transition in iodinated amorphous conducting carbon films

Kumari, Latha and Subramanyam, SV and Eto, S and Takai, K and Enoki, T (2004) Metal-Insulator transition in iodinated amorphous conducting carbon films. In: Carbon, 42 (11). pp. 2133-2137.


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In this work, the effect of iodine incorporation on the electrical conductivity, magnetic susceptibility (\chi) and magnetoresistance (MR) of amorphous conducting carbon (a-C) films has been discussed. Variation in conductivity of a-C films depends on the sample preparation conditions and iodine concentration. Evidence of metal-insulator (M-I) transition as a function of pyrolysis temperature is observed for iodinated (a-C:I) samples. The temperature dependent magnetic susceptibility of a-C:I sample shows a Curie behavior at low temperatures. The positive magnetoresistance is observed for all the samples irrespective of the conduction regimes. This is accounted by the electron-electron interaction in the a-C:I system.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to Elsevier Science.
Keywords: Carbon films;Intercalation;Pyrolysis;Transport properties
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: B.S Priyanka
Date Deposited: 03 Dec 2004
Last Modified: 19 Sep 2010 04:17
URI: http://eprints.iisc.ac.in/id/eprint/2401

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