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The effect of non-analytical corrections on the phononic thermal transport in InX (X = S, Se, Te) monolayers

We investigate the effect of non-analytical corrections on the phonon thermal transport properties in two-dimensional indium chalcogenide compounds. The longitudinal optical (LO) and transverse optical (TO) branches in the phonon dispersion are split near the Γ-point. The lattice thermal conductivit...

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Autores principales: Shafique, Aamir, Shin, Young-Han
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6978339/
https://www.ncbi.nlm.nih.gov/pubmed/31974441
http://dx.doi.org/10.1038/s41598-020-57644-0
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author Shafique, Aamir
Shin, Young-Han
author_facet Shafique, Aamir
Shin, Young-Han
author_sort Shafique, Aamir
collection PubMed
description We investigate the effect of non-analytical corrections on the phonon thermal transport properties in two-dimensional indium chalcogenide compounds. The longitudinal optical (LO) and transverse optical (TO) branches in the phonon dispersion are split near the Γ-point. The lattice thermal conductivity of monolayer InS is increased by 30.2% under non-analytical corrections because of the large LO-TO splitting at Γ-point. The predicted lattice thermal conductivities with non-analytical corrections at room temperature are 57.1 W/mK, 44.4 W/mK and 33.1 W/mK for the monolayer InS, InSe and InTe, respectively. The lattice thermal conductivity can be effectively reduced by nanostructures because the representative mean free paths are found very large in these monolayers. By quantifying the relative contribution of the phonon modes to the lattice thermal conductivity, we predict that the longitudinal acoustic branch is the main contributor to the lattice thermal conductivity. Due to the low lattice thermalconductivities of these monolayers, they can be useful in the nanoscale thermoelectric devices.
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spelling pubmed-69783392020-01-30 The effect of non-analytical corrections on the phononic thermal transport in InX (X = S, Se, Te) monolayers Shafique, Aamir Shin, Young-Han Sci Rep Article We investigate the effect of non-analytical corrections on the phonon thermal transport properties in two-dimensional indium chalcogenide compounds. The longitudinal optical (LO) and transverse optical (TO) branches in the phonon dispersion are split near the Γ-point. The lattice thermal conductivity of monolayer InS is increased by 30.2% under non-analytical corrections because of the large LO-TO splitting at Γ-point. The predicted lattice thermal conductivities with non-analytical corrections at room temperature are 57.1 W/mK, 44.4 W/mK and 33.1 W/mK for the monolayer InS, InSe and InTe, respectively. The lattice thermal conductivity can be effectively reduced by nanostructures because the representative mean free paths are found very large in these monolayers. By quantifying the relative contribution of the phonon modes to the lattice thermal conductivity, we predict that the longitudinal acoustic branch is the main contributor to the lattice thermal conductivity. Due to the low lattice thermalconductivities of these monolayers, they can be useful in the nanoscale thermoelectric devices. Nature Publishing Group UK 2020-01-23 /pmc/articles/PMC6978339/ /pubmed/31974441 http://dx.doi.org/10.1038/s41598-020-57644-0 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
Shafique, Aamir
Shin, Young-Han
The effect of non-analytical corrections on the phononic thermal transport in InX (X = S, Se, Te) monolayers
title The effect of non-analytical corrections on the phononic thermal transport in InX (X = S, Se, Te) monolayers
title_full The effect of non-analytical corrections on the phononic thermal transport in InX (X = S, Se, Te) monolayers
title_fullStr The effect of non-analytical corrections on the phononic thermal transport in InX (X = S, Se, Te) monolayers
title_full_unstemmed The effect of non-analytical corrections on the phononic thermal transport in InX (X = S, Se, Te) monolayers
title_short The effect of non-analytical corrections on the phononic thermal transport in InX (X = S, Se, Te) monolayers
title_sort effect of non-analytical corrections on the phononic thermal transport in inx (x = s, se, te) monolayers
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6978339/
https://www.ncbi.nlm.nih.gov/pubmed/31974441
http://dx.doi.org/10.1038/s41598-020-57644-0
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