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Tunable Graphene Phononic Crystal
[Image: see text] In the field of phononics, periodic patterning controls vibrations and thereby the flow of heat and sound in matter. Bandgaps arising in such phononic crystals (PnCs) realize low-dissipation vibrational modes and enable applications toward mechanical qubits, efficient waveguides, a...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2021
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7953378/ https://www.ncbi.nlm.nih.gov/pubmed/33622035 http://dx.doi.org/10.1021/acs.nanolett.0c04986 |
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author | Kirchhof, Jan N. Weinel, Kristina Heeg, Sebastian Deinhart, Victor Kovalchuk, Sviatoslav Höflich, Katja Bolotin, Kirill I. |
author_facet | Kirchhof, Jan N. Weinel, Kristina Heeg, Sebastian Deinhart, Victor Kovalchuk, Sviatoslav Höflich, Katja Bolotin, Kirill I. |
author_sort | Kirchhof, Jan N. |
collection | PubMed |
description | [Image: see text] In the field of phononics, periodic patterning controls vibrations and thereby the flow of heat and sound in matter. Bandgaps arising in such phononic crystals (PnCs) realize low-dissipation vibrational modes and enable applications toward mechanical qubits, efficient waveguides, and state-of-the-art sensing. Here, we combine phononics and two-dimensional materials and explore tuning of PnCs via applied mechanical pressure. To this end, we fabricate the thinnest possible PnC from monolayer graphene and simulate its vibrational properties. We find a bandgap in the megahertz regime within which we localize a defect mode with a small effective mass of 0.72 ag = 0.002 m(physical). We exploit graphene’s flexibility and simulate mechanical tuning of a finite size PnC. Under electrostatic pressure up to 30 kPa, we observe an upshift in frequency of the entire phononic system by ∼350%. At the same time, the defect mode stays within the bandgap and remains localized, suggesting a high-quality, dynamically tunable mechanical system. |
format | Online Article Text |
id | pubmed-7953378 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-79533782021-03-12 Tunable Graphene Phononic Crystal Kirchhof, Jan N. Weinel, Kristina Heeg, Sebastian Deinhart, Victor Kovalchuk, Sviatoslav Höflich, Katja Bolotin, Kirill I. Nano Lett [Image: see text] In the field of phononics, periodic patterning controls vibrations and thereby the flow of heat and sound in matter. Bandgaps arising in such phononic crystals (PnCs) realize low-dissipation vibrational modes and enable applications toward mechanical qubits, efficient waveguides, and state-of-the-art sensing. Here, we combine phononics and two-dimensional materials and explore tuning of PnCs via applied mechanical pressure. To this end, we fabricate the thinnest possible PnC from monolayer graphene and simulate its vibrational properties. We find a bandgap in the megahertz regime within which we localize a defect mode with a small effective mass of 0.72 ag = 0.002 m(physical). We exploit graphene’s flexibility and simulate mechanical tuning of a finite size PnC. Under electrostatic pressure up to 30 kPa, we observe an upshift in frequency of the entire phononic system by ∼350%. At the same time, the defect mode stays within the bandgap and remains localized, suggesting a high-quality, dynamically tunable mechanical system. American Chemical Society 2021-02-23 2021-03-10 /pmc/articles/PMC7953378/ /pubmed/33622035 http://dx.doi.org/10.1021/acs.nanolett.0c04986 Text en © 2021 The Authors. Published by American Chemical Society This is an open access article published under an ACS AuthorChoice License (https://creativecommons.org/licenses/by/4.0/) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes. |
spellingShingle | Kirchhof, Jan N. Weinel, Kristina Heeg, Sebastian Deinhart, Victor Kovalchuk, Sviatoslav Höflich, Katja Bolotin, Kirill I. Tunable Graphene Phononic Crystal |
title | Tunable Graphene Phononic Crystal |
title_full | Tunable Graphene Phononic Crystal |
title_fullStr | Tunable Graphene Phononic Crystal |
title_full_unstemmed | Tunable Graphene Phononic Crystal |
title_short | Tunable Graphene Phononic Crystal |
title_sort | tunable graphene phononic crystal |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7953378/ https://www.ncbi.nlm.nih.gov/pubmed/33622035 http://dx.doi.org/10.1021/acs.nanolett.0c04986 |
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