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Three-dimensional calculation of field emission from carbon nanotubes using a transfermatrix methodology

Published online by Cambridge University Press:  21 March 2011

Alexandre Mayer ,
Nicholas M. Miskovsky  and
Paul H. Cutler
Alexandre Mayer
Affiliation:
Laboratoire de Physique du Solide, Facultes Universitaires N.-D. de la Paix, Rue de Bruxelles 61, B-5000 Namur, Belgium
Nicholas M. Miskovsky
Affiliation:
Department of Physics, 104 Davey Lab, Penn State University, University Park, PA 16802, U.S.A.
Paul H. Cutler
Affiliation:
Department of Physics, 104 Davey Lab, Penn State University, University Park, PA 16802, U.S.A.
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Abstract

We present simulations of field emission from carbon nanotubes, using a transfer-matrix methodology. By repeating periodically a basic unit of the nanotubes in the region preceding that containing the extraction field, specific band-structure effects are included in the distribution of incident states, i.e. those entering the field region. The structures considered are the metallic (5,5) and the semiconducting (10,0) single-wall carbon nanotubes. The total-energy distributions of incident states show the gap of the (10,0) and the expected flat region for the (5,5) nanotube. The field-emitted electron energy distributions contain peaks, which are sharper for the (10,0) structure. Except for peaks associated with van Hove singularities in the distribution of incident states or with the Fermi level in the case of a metallic structure, all peaks are shifted to lower energies by the electric field.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 675: Symposium W – Nanotubes, Fullerenes, Nanostructured and Disordered Carbon , 2001 , W6.10.1
Copyright
Copyright © Materials Research Society 2001

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