Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 6380 |
| Fachzeitschrift | Nature Communications |
| Jahrgang | 11 |
| Ausgabenummer | 1 |
| Publikationsstatus | Veröffentlicht - 11 Dez. 2020 |
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 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.
ASJC Scopus Sachgebiete
- Chemie (insg.)
- Allgemeine Chemie
- Biochemie, Genetik und Molekularbiologie (insg.)
- Allgemeine Biochemie, Genetik und Molekularbiologie
- Physik und Astronomie (insg.)
- Allgemeine Physik und Astronomie
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in: Nature Communications, Jahrgang 11, Nr. 1, 6380, 11.12.2020.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - One-dimensional confinement and width-dependent bandgap formation in epitaxial graphene nanoribbons
AU - Karakachian, Hrag
AU - Nguyen, T. T.Nhung
AU - Aprojanz, Johannes
AU - Zakharov, Alexei A.
AU - Yakimova, Rositsa
AU - Rosenzweig, Philipp
AU - Polley, Craig M.
AU - Balasubramanian, Thiagarajan
AU - Tegenkamp, Christoph
AU - Power, Stephen R.
AU - Starke, Ulrich
N1 - Funding Information: We would like to thank Ulrike Waizmann and Thomas Reindl for performing the e-beam lithography and reactive ion etching at the Nanostructuring Lab of the Max Planck Institute for Solid State Research. We also acknowledge the MAX IV and HZB/Bessy laboratories for the allocation of synchrotron radiation beamtime. This work was supported by the Deutsche Forschungsgemeinschaft (DFG) through Sta315/9-1 and Te386/ 13-1. S.R.P. acknowledges funding from the Irish Research Council under the Laureate awards programme.
PY - 2020/12/11
Y1 - 2020/12/11
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85097499357&partnerID=8YFLogxK
U2 - 10.1038/s41467-020-19051-x
DO - 10.1038/s41467-020-19051-x
M3 - Article
C2 - 33311455
AN - SCOPUS:85097499357
VL - 11
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
IS - 1
M1 - 6380
ER -