Cargando…
Roton-like acoustical dispersion relations in 3D metamaterials
Roton dispersion relations have been restricted to correlated quantum systems at low temperatures, such as liquid Helium-4, thin films of Helium-3, and Bose–Einstein condensates. This unusual kind of dispersion relation provides broadband acoustical backward waves, connected to energy flow vortices...
Autores principales: | , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8172548/ https://www.ncbi.nlm.nih.gov/pubmed/34078904 http://dx.doi.org/10.1038/s41467-021-23574-2 |
_version_ | 1783702551447732224 |
---|---|
author | Chen, Yi Kadic, Muamer Wegener, Martin |
author_facet | Chen, Yi Kadic, Muamer Wegener, Martin |
author_sort | Chen, Yi |
collection | PubMed |
description | Roton dispersion relations have been restricted to correlated quantum systems at low temperatures, such as liquid Helium-4, thin films of Helium-3, and Bose–Einstein condensates. This unusual kind of dispersion relation provides broadband acoustical backward waves, connected to energy flow vortices due to a “return flow”, in the words of Feynman, and three different coexisting acoustical modes with the same polarization at one frequency. By building mechanisms into the unit cells of artificial materials, metamaterials allow for molding the flow of waves. So far, researchers have exploited mechanisms based on various types of local resonances, Bragg resonances, spatial and temporal symmetry breaking, topology, and nonlinearities. Here, we introduce beyond-nearest-neighbor interactions as a mechanism in elastic and airborne acoustical metamaterials. For a third-nearest-neighbor interaction that is sufficiently strong compared to the nearest-neighbor interaction, this mechanism allows us to engineer roton-like acoustical dispersion relations under ambient conditions. |
format | Online Article Text |
id | pubmed-8172548 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-81725482021-06-07 Roton-like acoustical dispersion relations in 3D metamaterials Chen, Yi Kadic, Muamer Wegener, Martin Nat Commun Article Roton dispersion relations have been restricted to correlated quantum systems at low temperatures, such as liquid Helium-4, thin films of Helium-3, and Bose–Einstein condensates. This unusual kind of dispersion relation provides broadband acoustical backward waves, connected to energy flow vortices due to a “return flow”, in the words of Feynman, and three different coexisting acoustical modes with the same polarization at one frequency. By building mechanisms into the unit cells of artificial materials, metamaterials allow for molding the flow of waves. So far, researchers have exploited mechanisms based on various types of local resonances, Bragg resonances, spatial and temporal symmetry breaking, topology, and nonlinearities. Here, we introduce beyond-nearest-neighbor interactions as a mechanism in elastic and airborne acoustical metamaterials. For a third-nearest-neighbor interaction that is sufficiently strong compared to the nearest-neighbor interaction, this mechanism allows us to engineer roton-like acoustical dispersion relations under ambient conditions. Nature Publishing Group UK 2021-06-02 /pmc/articles/PMC8172548/ /pubmed/34078904 http://dx.doi.org/10.1038/s41467-021-23574-2 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 Chen, Yi Kadic, Muamer Wegener, Martin Roton-like acoustical dispersion relations in 3D metamaterials |
title | Roton-like acoustical dispersion relations in 3D metamaterials |
title_full | Roton-like acoustical dispersion relations in 3D metamaterials |
title_fullStr | Roton-like acoustical dispersion relations in 3D metamaterials |
title_full_unstemmed | Roton-like acoustical dispersion relations in 3D metamaterials |
title_short | Roton-like acoustical dispersion relations in 3D metamaterials |
title_sort | roton-like acoustical dispersion relations in 3d metamaterials |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8172548/ https://www.ncbi.nlm.nih.gov/pubmed/34078904 http://dx.doi.org/10.1038/s41467-021-23574-2 |
work_keys_str_mv | AT chenyi rotonlikeacousticaldispersionrelationsin3dmetamaterials AT kadicmuamer rotonlikeacousticaldispersionrelationsin3dmetamaterials AT wegenermartin rotonlikeacousticaldispersionrelationsin3dmetamaterials |