The University of Southampton
University of Southampton Institutional Repository

Modeling SWCNT Band-gap and Effective Mass Variation using a Monte Carlo Approach

Record type: Article

Synthesizing Single-Walled Carbon-Nanotubes (SWCNTs) with accurate structural control has been widely acknowledged as an exceedingly complex task culminating in the realization of CNT devices with uncertain electronic behavior. In this paper we apply a statistical approach in predicting the SWCNT band-gap and effective mass variation for typical uncertainties associated with the geometrical structure. This is firstly carried out by proposing a simulation-efficient analytical model that evaluates the band-gap (Eg) of an isolated SWCNT with a specified diameter (d) and chirality (?). Similarly, we develop a SWCNT effective mass model, which is applicable to CNTs of any chirality and diameters > 1nm. A Monte Carlo method is later adopted to simulate the band-gap and effective mass variation for a selection of structural parameter distributions. As a result, we establish analytical expressions that separately specify the band-gap and effective mass variability (Eg?, m*?) with respect to the CNT mean diameter (d?) and standard deviation (d?). These expressions offer insight from a theoretical perspective on the optimization of diameter-related process parameters with the aim of suppressing band-gap and effective mass variation.

PDF Modeling_SWCNT_Band-gap_and_Effective_Mass_Variation_using_a_Monte_Carlo_Approach.pdf - Author's Original
Download (607kB)

Citation

El Shabrawy, Karim, Maharatna, Koushik, Bagnall, Darren and Al-Hashimi, Bashir (2009) Modeling SWCNT Band-gap and Effective Mass Variation using a Monte Carlo Approach IEEE Transactions on Nanotechnology

More information

Submitted date: 2009
Keywords: Single Walled Carbon Nanotube (SWCNT), Third-Nearest-Neighbor Tight-Binding (TB) model, Band-gap variation, Effective mass variation, CNT device models.
Organisations: Nanoelectronics and Nanotechnology, Electronic & Software Systems

Identifiers

Local EPrints ID: 268090
URI: http://eprints.soton.ac.uk/id/eprint/268090
PURE UUID: 567f44e7-354f-46b5-a09c-5e6d3a8cf6c6

Catalogue record

Date deposited: 21 Oct 2009 17:03
Last modified: 18 Jul 2017 06:57

Export record


Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×