Authors:	Richter, Nils Chen, Zongping Tries, Alexander Prechtl, Thorsten Narita, Akimitsu Müllen, Klaus Asadi, Kamal Bonn, Mischa Kläui, Mathias
Title:	Charge transport mechanism in networks of armchair graphene nanoribbons
Online publication date:	28-Oct-2020
Year of first publication:	2020
Language:	english
Abstract:	In graphene nanoribbons (GNRs), the lateral confinement of charge carriers opens a band gap, the key feature that enables novel graphene-based electronics. Despite great progress, reliable and reproducible fabrication of single-ribbon field-effect transistors (FETs) is still a challenge, impeding the understanding of the charge transport. Here, we present reproducible fabrication of armchair GNR-FETs based on networks of nanoribbons and analyze the charge transport mechanism using nine-atom wide and, in particular, five-atom-wide GNRs with large conductivity. We show formation of reliable Ohmic contacts and a yield of functional FETs close to unity by lamination of GNRs to electrodes. Modeling the charge transport in the networks reveals that transport is governed by inter-ribbon hopping mediated by nuclear tunneling, with a hopping length comparable to the physical GNR length. Overcoming the challenge of low-yield single-ribbon transistors by the networks and identifying the corresponding charge transport mechanism is a key step forward for functionalization of GNRs.
DDC:	530 Physik 530 Physics
Institution:	Johannes Gutenberg-Universität Mainz
Department:	FB 08 Physik, Mathematik u. Informatik
Place:	Mainz
ROR:	https://ror.org/023b0x485
DOI:	http://doi.org/10.25358/openscience-5142
Version:	Published version
Publication type:	Zeitschriftenaufsatz
License:	CC BY
Information on rights of use:	https://creativecommons.org/licenses/by/4.0/
Journal:	Scientific reports 10
Pages or article number:	Art. 1988
Publisher:	Macmillan Publishers Limited, part of Springer Nature
Publisher place:	London
Issue date:	2020
ISSN:	2045-2322
Publisher URL:	https://www.doi.org/10.1038/s41598-020-58660-w
Publisher DOI:	10.1038/s41598-020-58660-w
Appears in collections:	JGU-Publikationen