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Lightwave-driven scanning tunnelling spectroscopy of atomically precise graphene nanoribbons

Atomically precise electronics operating at optical frequencies require tools that can characterize them on their intrinsic length and time scales to guide device design. Lightwave-driven scanning tunnelling microscopy is a promising technique towards this purpose. It achieves simultaneous sub-ångst...

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Autores principales: Ammerman, S. E., Jelic, V., Wei, Y., Breslin, V. N., Hassan, M., Everett, N., Lee, S., Sun, Q., Pignedoli, C. A., Ruffieux, P., Fasel, R., Cocker, T. L.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8611099/
https://www.ncbi.nlm.nih.gov/pubmed/34815398
http://dx.doi.org/10.1038/s41467-021-26656-3
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author Ammerman, S. E.
Jelic, V.
Wei, Y.
Breslin, V. N.
Hassan, M.
Everett, N.
Lee, S.
Sun, Q.
Pignedoli, C. A.
Ruffieux, P.
Fasel, R.
Cocker, T. L.
author_facet Ammerman, S. E.
Jelic, V.
Wei, Y.
Breslin, V. N.
Hassan, M.
Everett, N.
Lee, S.
Sun, Q.
Pignedoli, C. A.
Ruffieux, P.
Fasel, R.
Cocker, T. L.
author_sort Ammerman, S. E.
collection PubMed
description Atomically precise electronics operating at optical frequencies require tools that can characterize them on their intrinsic length and time scales to guide device design. Lightwave-driven scanning tunnelling microscopy is a promising technique towards this purpose. It achieves simultaneous sub-ångström and sub-picosecond spatio-temporal resolution through ultrafast coherent control by single-cycle field transients that are coupled to the scanning probe tip from free space. Here, we utilize lightwave-driven terahertz scanning tunnelling microscopy and spectroscopy to investigate atomically precise seven-atom-wide armchair graphene nanoribbons on a gold surface at ultralow tip heights, unveiling highly localized wavefunctions that are inaccessible by conventional scanning tunnelling microscopy. Tomographic imaging of their electron densities reveals vertical decays that depend sensitively on wavefunction and lateral position. Lightwave-driven scanning tunnelling spectroscopy on the ångström scale paves the way for ultrafast measurements of wavefunction dynamics in atomically precise nanostructures and future optoelectronic devices based on locally tailored electronic properties.
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spelling pubmed-86110992021-12-01 Lightwave-driven scanning tunnelling spectroscopy of atomically precise graphene nanoribbons Ammerman, S. E. Jelic, V. Wei, Y. Breslin, V. N. Hassan, M. Everett, N. Lee, S. Sun, Q. Pignedoli, C. A. Ruffieux, P. Fasel, R. Cocker, T. L. Nat Commun Article Atomically precise electronics operating at optical frequencies require tools that can characterize them on their intrinsic length and time scales to guide device design. Lightwave-driven scanning tunnelling microscopy is a promising technique towards this purpose. It achieves simultaneous sub-ångström and sub-picosecond spatio-temporal resolution through ultrafast coherent control by single-cycle field transients that are coupled to the scanning probe tip from free space. Here, we utilize lightwave-driven terahertz scanning tunnelling microscopy and spectroscopy to investigate atomically precise seven-atom-wide armchair graphene nanoribbons on a gold surface at ultralow tip heights, unveiling highly localized wavefunctions that are inaccessible by conventional scanning tunnelling microscopy. Tomographic imaging of their electron densities reveals vertical decays that depend sensitively on wavefunction and lateral position. Lightwave-driven scanning tunnelling spectroscopy on the ångström scale paves the way for ultrafast measurements of wavefunction dynamics in atomically precise nanostructures and future optoelectronic devices based on locally tailored electronic properties. Nature Publishing Group UK 2021-11-23 /pmc/articles/PMC8611099/ /pubmed/34815398 http://dx.doi.org/10.1038/s41467-021-26656-3 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Ammerman, S. E.
Jelic, V.
Wei, Y.
Breslin, V. N.
Hassan, M.
Everett, N.
Lee, S.
Sun, Q.
Pignedoli, C. A.
Ruffieux, P.
Fasel, R.
Cocker, T. L.
Lightwave-driven scanning tunnelling spectroscopy of atomically precise graphene nanoribbons
title Lightwave-driven scanning tunnelling spectroscopy of atomically precise graphene nanoribbons
title_full Lightwave-driven scanning tunnelling spectroscopy of atomically precise graphene nanoribbons
title_fullStr Lightwave-driven scanning tunnelling spectroscopy of atomically precise graphene nanoribbons
title_full_unstemmed Lightwave-driven scanning tunnelling spectroscopy of atomically precise graphene nanoribbons
title_short Lightwave-driven scanning tunnelling spectroscopy of atomically precise graphene nanoribbons
title_sort lightwave-driven scanning tunnelling spectroscopy of atomically precise graphene nanoribbons
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8611099/
https://www.ncbi.nlm.nih.gov/pubmed/34815398
http://dx.doi.org/10.1038/s41467-021-26656-3
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