One-dimensional confinement and width-dependent bandgap formation in epitaxial graphene nanoribbons
(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.
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- author
- organization
- publishing date
- 2020
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Nature Communications
- volume
- 11
- issue
- 1
- article number
- 6380
- publisher
- Nature Publishing Group
- external identifiers
-
- scopus:85097499357
- pmid:33311455
- 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
- 2024-06-28 06:48:16
@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}},
}