Please use this identifier to cite or link to this item:
Title: Contact effects in graphene nanoribbon transistors
Authors: Liang, G. 
Neophytou, N.
Lundstrom, M.S.
Nikonov, D.E.
Issue Date: Jul-2008
Citation: Liang, G., Neophytou, N., Lundstrom, M.S., Nikonov, D.E. (2008-07). Contact effects in graphene nanoribbon transistors. Nano Letters 8 (7) : 1819-1824. ScholarBank@NUS Repository.
Abstract: The effects of the various contact types and shapes on the performance of Schottky barrier graphene nanoribbon field-effect-transistors (GNRFETs) have been investigated using a real-space quantum transport simulator based on the NEGF approach self-consistently coupled to a three-dimensional Poisson solver for treating the electrostatics. The device channel considered is a double gate semiconducting armchair nanoribbon. The types of contacts considered are (a) a semi-infinite normal metal, (b) a semi-infinite graphene sheet, (c) finite size rectangular shape armchair graphene contacts, (d) finite size wedge shape graphene contacts, and (e) zigzag graphene nanoribbon contacts. Among these different contact types, the semi-infinite graphene sheet contacts show the worst performance because of their very low density of states around the Dirac point resulting in low transmission possibility through the Schottky barrier, both at ON and OFF states. Although all other types of contacts can have significant enhancement in I on to I off ratio, the zigzag GNR contacts show promising and size invariant performance due to the metallic properties. © 2008 American Chemical Society.
Source Title: Nano Letters
ISSN: 15306984
DOI: 10.1021/nl080255r
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Jun 1, 2023


checked on May 25, 2023

Page view(s)

checked on May 25, 2023

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.