Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

One-dimensional confinement and width-dependent bandgap formation in epitaxial graphene nanoribbons

Karakachian, Hrag ; Nguyen, T. T.Nhung ; Aprojanz, Johannes ; Zakharov, Alexei A. LU ; Yakimova, Rositsa ; Rosenzweig, Philipp ; Polley, Craig M. LU ; Balasubramanian, Thiagarajan LU ; Tegenkamp, Christoph and Power, Stephen R. , et al. (2020) In Nature Communications 11(1).
Abstract

The ability to define an off state in logic electronics is the key ingredient that is impossible to fulfill using a conventional pristine graphene layer, due to the absence of an electronic bandgap. For years, this property has been the missing element for incorporating graphene into next-generation field effect transistors. In this work, we grow high-quality armchair graphene nanoribbons on the sidewalls of 6H-SiC mesa structures. Angle-resolved photoelectron spectroscopy (ARPES) and scanning tunneling spectroscopy measurements reveal the development of a width-dependent semiconducting gap driven by quantum confinement effects. Furthermore, ARPES demonstrates an ideal one-dimensional electronic behavior that is realized in a... (More)

The ability to define an off state in logic electronics is the key ingredient that is impossible to fulfill using a conventional pristine graphene layer, due to the absence of an electronic bandgap. For years, this property has been the missing element for incorporating graphene into next-generation field effect transistors. In this work, we grow high-quality armchair graphene nanoribbons on the sidewalls of 6H-SiC mesa structures. Angle-resolved photoelectron spectroscopy (ARPES) and scanning tunneling spectroscopy measurements reveal the development of a width-dependent semiconducting gap driven by quantum confinement effects. Furthermore, ARPES demonstrates an ideal one-dimensional electronic behavior that is realized in a graphene-based environment, consisting of well-resolved subbands, dispersing and non-dispersing along and across the ribbons respectively. Our experimental findings, coupled with theoretical tight-binding calculations, set the grounds for a deeper exploration of quantum confinement phenomena and may open intriguing avenues for new low-power electronics.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; ; ; ; and , et al. (More)
; ; ; ; ; ; ; ; ; and (Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nature Communications
volume
11
issue
1
article number
6380
publisher
Nature Publishing Group
external identifiers
  • pmid:33311455
  • scopus:85097499357
ISSN
2041-1723
DOI
10.1038/s41467-020-19051-x
language
English
LU publication?
yes
id
8c59f89a-3562-490b-8784-ae4c11cfda1f
date added to LUP
2020-12-22 09:30:49
date last changed
2024-04-17 21:37:27
@article{8c59f89a-3562-490b-8784-ae4c11cfda1f,
  abstract     = {{<p>The ability to define an off state in logic electronics is the key ingredient that is impossible to fulfill using a conventional pristine graphene layer, due to the absence of an electronic bandgap. For years, this property has been the missing element for incorporating graphene into next-generation field effect transistors. In this work, we grow high-quality armchair graphene nanoribbons on the sidewalls of 6H-SiC mesa structures. Angle-resolved photoelectron spectroscopy (ARPES) and scanning tunneling spectroscopy measurements reveal the development of a width-dependent semiconducting gap driven by quantum confinement effects. Furthermore, ARPES demonstrates an ideal one-dimensional electronic behavior that is realized in a graphene-based environment, consisting of well-resolved subbands, dispersing and non-dispersing along and across the ribbons respectively. Our experimental findings, coupled with theoretical tight-binding calculations, set the grounds for a deeper exploration of quantum confinement phenomena and may open intriguing avenues for new low-power electronics.</p>}},
  author       = {{Karakachian, Hrag and Nguyen, T. T.Nhung and Aprojanz, Johannes and Zakharov, Alexei A. and Yakimova, Rositsa and Rosenzweig, Philipp and Polley, Craig M. and Balasubramanian, Thiagarajan and Tegenkamp, Christoph and Power, Stephen R. and Starke, Ulrich}},
  issn         = {{2041-1723}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{Nature Publishing Group}},
  series       = {{Nature Communications}},
  title        = {{One-dimensional confinement and width-dependent bandgap formation in epitaxial graphene nanoribbons}},
  url          = {{http://dx.doi.org/10.1038/s41467-020-19051-x}},
  doi          = {{10.1038/s41467-020-19051-x}},
  volume       = {{11}},
  year         = {{2020}},
}