Energy Gaps in Etched Graphene Nanoribbons
Open accessAbstract
Transport measurements on an etched graphene nanoribbon are presented. It is shown that two distinct voltage scales can be experimentally extracted that characterize the parameter region of suppressed conductance at low charge density in the ribbon. One of them is related to the charging energy of localized states, the other to the strength of the disorder potential. The lever arms of gates vary by up to 30% for different localized states which must therefore be spread in position along the ribbon. A single-electron transistor is used to prove the addition of individual electrons to the localized states. In our sample the characteristic charging energy is of the order of 10 meV, the characteristic strength of the disorder potential of the order of 100 meV.
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Two effects may play a role in the proposed experiment: electron-electron interaction and disorder.
“Two effects may play a role in the proposed experiment: the electron - electron (ee) interaction [45] and the presence of disorder [46, 47].”
From Theory of electron Zitterbewegung in graphene probed by femtosecond laser pulses (2009) · cites this paper as [47]
The disorder potential may change the position of the Fermi level within the sample.
“Additionally, the disorder potential may change the position of the Fermi level within sample.”
From Theory of electron Zitterbewegung in graphene probed by femtosecond laser pulses (2009) · cites this paper as [47]
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- Authors
- Stampfer, C., Güttinger, J., Hellmüller, S., Molitor, F., Ensslin, K., & Ihn, T.
- Affiliations
- ETH Zurich (CH)
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2009-02-03
- Volume
- 102
- Issue
- 5
- Pages
- 056403-056403
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2052316277
- Cited by
- 433
- References
- 27
- Citations by year
- 2026: 4 · 2025: 5 · 2024: 5 · 2023: 10 · 2022: 12 · 2021: 9 · 2020: 35 · 2019: 19 · 2018: 19 · 2017: 21 · 2016: 30 · 2015: 26 · 2014: 39 · 2013: 32 · 2012: 56
- FWCI
- 26.68
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Physical Review Letters (publishedVersion)
- PubMed (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- arXiv (Cornell University)
- Topics
- Physical Sciences › Materials Science › Materials Chemistry › Graphene research and applications
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum and electron transport phenomena
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Surface and Thin Film Phenomena
- Keywords
- graphene nanoribbons, band gap, localized states, charging energy, disorder potential, single-electron transistor, electron addition, conductance suppression
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