Surface phonons in topological insulator Bi(2)Te(3) investigated by Brillouin light scattering

High resolution Brillouin spectroscopy was used for the first time to study the dispersion and anisotropy of surface phonons in the single crystal of topological insulator Bi(2)Te(3). Two surface acoustic waves have been observed, which distinguishes this material from other metals or nontransparent...

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Autores principales: Trzaskowska, Aleksandra, Mroz, Boguslaw
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7367295/
https://www.ncbi.nlm.nih.gov/pubmed/32678195
http://dx.doi.org/10.1038/s41598-020-68690-z
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author Trzaskowska, Aleksandra
Mroz, Boguslaw
author_facet Trzaskowska, Aleksandra
Mroz, Boguslaw
author_sort Trzaskowska, Aleksandra
collection PubMed
description High resolution Brillouin spectroscopy was used for the first time to study the dispersion and anisotropy of surface phonons in the single crystal of topological insulator Bi(2)Te(3). Two surface acoustic waves have been observed, which distinguishes this material from other metals or nontransparent materials. The modes were assigned as Rayleigh waves. The obtained results were then simulated by Finite Element Method. The layered structure of the unit cell proposed in simulation reproduced quite well experimental results of the modes dispersion and anisotropy.
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spelling pubmed-73672952020-07-20 Surface phonons in topological insulator Bi(2)Te(3) investigated by Brillouin light scattering Trzaskowska, Aleksandra Mroz, Boguslaw Sci Rep Article High resolution Brillouin spectroscopy was used for the first time to study the dispersion and anisotropy of surface phonons in the single crystal of topological insulator Bi(2)Te(3). Two surface acoustic waves have been observed, which distinguishes this material from other metals or nontransparent materials. The modes were assigned as Rayleigh waves. The obtained results were then simulated by Finite Element Method. The layered structure of the unit cell proposed in simulation reproduced quite well experimental results of the modes dispersion and anisotropy. Nature Publishing Group UK 2020-07-16 /pmc/articles/PMC7367295/ /pubmed/32678195 http://dx.doi.org/10.1038/s41598-020-68690-z Text en © The Author(s) 2020 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/.
spellingShingle Article
Trzaskowska, Aleksandra
Mroz, Boguslaw
Surface phonons in topological insulator Bi(2)Te(3) investigated by Brillouin light scattering
title Surface phonons in topological insulator Bi(2)Te(3) investigated by Brillouin light scattering
title_full Surface phonons in topological insulator Bi(2)Te(3) investigated by Brillouin light scattering
title_fullStr Surface phonons in topological insulator Bi(2)Te(3) investigated by Brillouin light scattering
title_full_unstemmed Surface phonons in topological insulator Bi(2)Te(3) investigated by Brillouin light scattering
title_short Surface phonons in topological insulator Bi(2)Te(3) investigated by Brillouin light scattering
title_sort surface phonons in topological insulator bi(2)te(3) investigated by brillouin light scattering
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7367295/
https://www.ncbi.nlm.nih.gov/pubmed/32678195
http://dx.doi.org/10.1038/s41598-020-68690-z
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AT mrozboguslaw surfacephononsintopologicalinsulatorbi2te3investigatedbybrillouinlightscattering

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