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Novel Semiconducting Phase of Amorphous Carbon Nickel Composite Films

Published online by Cambridge University Press:  01 February 2011

Somnath Bhattacharyya ,
S. J. Henley ,
N. P. Blanchard  and
S. R. P. Silva
Somnath Bhattacharyya
Affiliation:
[email protected], University of Surrey, Advanced Technology Institute, University of Surrey, Guildford, Surrey, GU2 7XH, India, +44 1483 682297, +44 1483 689404
S. J. Henley
Affiliation:
[email protected], Nano-electronics Centre, Advanced Technology Institute, University of Surrey, Guildford, GU2 7XH, United Kingdom
N. P. Blanchard
Affiliation:
[email protected], Nano-electronics Centre, Advanced Technology Institute, University of Surrey, Guildford, GU2 7XH, United Kingdom
S. R. P. Silva
Affiliation:
[email protected], Nano-electronics Centre, Advanced Technology Institute, University of Surrey, Guildford, GU2 7XH, United Kingdom
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Abstract

A homogeneously mixed phase of carbon and 10% nickel yielding amorphous carbon-nickel composite (a-C-Ni) films is prepared by an excimer UV pulsed laser ablation. Conductivity study of these films shows a nearly activated conduction. Also a saturation of conductivity below a temperature of 25 K explains the presence of an additional density of states at the Fermi level in these samples. Our experiments demonstrate a very different behaviour of electronic properties of these novel materials compared to undoped diamond-like carbon (DLC) films, which was directly confirmed using valence band spectroscopy.

Keywords

amorphouselectrical propertieslaser ablation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 910: Symposium A – Amorphous and Polycrystalline Thin-Film Silicon Science and Technology – 2006 , 2006 , 0910-A12-04
Copyright
Copyright © Materials Research Society 2006

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