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Anisotropic in-plane thermal conductivity observed in few-layer black phosphorus
Black phosphorus has been revisited recently as a new two-dimensional material showing potential applications in electronics and optoelectronics. Here we report the anisotropic in-plane thermal conductivity of suspended few-layer black phosphorus measured by micro-Raman spectroscopy. The armchair an...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4634212/ https://www.ncbi.nlm.nih.gov/pubmed/26472191 http://dx.doi.org/10.1038/ncomms9572 |
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author | Luo, Zhe Maassen, Jesse Deng, Yexin Du, Yuchen Garrelts, Richard P. Lundstrom, Mark S Ye, Peide D. Xu, Xianfan |
author_facet | Luo, Zhe Maassen, Jesse Deng, Yexin Du, Yuchen Garrelts, Richard P. Lundstrom, Mark S Ye, Peide D. Xu, Xianfan |
author_sort | Luo, Zhe |
collection | PubMed |
description | Black phosphorus has been revisited recently as a new two-dimensional material showing potential applications in electronics and optoelectronics. Here we report the anisotropic in-plane thermal conductivity of suspended few-layer black phosphorus measured by micro-Raman spectroscopy. The armchair and zigzag thermal conductivities are ∼20 and ∼40 W m(−1) K(−1) for black phosphorus films thicker than 15 nm, respectively, and decrease to ∼10 and ∼20 W m(−1) K(−1) as the film thickness is reduced, exhibiting significant anisotropy. The thermal conductivity anisotropic ratio is found to be ∼2 for thick black phosphorus films and drops to ∼1.5 for the thinnest 9.5-nm-thick film. Theoretical modelling reveals that the observed anisotropy is primarily related to the anisotropic phonon dispersion, whereas the intrinsic phonon scattering rates are found to be similar along the armchair and zigzag directions. Surface scattering in the black phosphorus films is shown to strongly suppress the contribution of long mean-free-path acoustic phonons. |
format | Online Article Text |
id | pubmed-4634212 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-46342122015-11-25 Anisotropic in-plane thermal conductivity observed in few-layer black phosphorus Luo, Zhe Maassen, Jesse Deng, Yexin Du, Yuchen Garrelts, Richard P. Lundstrom, Mark S Ye, Peide D. Xu, Xianfan Nat Commun Article Black phosphorus has been revisited recently as a new two-dimensional material showing potential applications in electronics and optoelectronics. Here we report the anisotropic in-plane thermal conductivity of suspended few-layer black phosphorus measured by micro-Raman spectroscopy. The armchair and zigzag thermal conductivities are ∼20 and ∼40 W m(−1) K(−1) for black phosphorus films thicker than 15 nm, respectively, and decrease to ∼10 and ∼20 W m(−1) K(−1) as the film thickness is reduced, exhibiting significant anisotropy. The thermal conductivity anisotropic ratio is found to be ∼2 for thick black phosphorus films and drops to ∼1.5 for the thinnest 9.5-nm-thick film. Theoretical modelling reveals that the observed anisotropy is primarily related to the anisotropic phonon dispersion, whereas the intrinsic phonon scattering rates are found to be similar along the armchair and zigzag directions. Surface scattering in the black phosphorus films is shown to strongly suppress the contribution of long mean-free-path acoustic phonons. Nature Publishing Group 2015-10-16 /pmc/articles/PMC4634212/ /pubmed/26472191 http://dx.doi.org/10.1038/ncomms9572 Text en Copyright © 2015, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Luo, Zhe Maassen, Jesse Deng, Yexin Du, Yuchen Garrelts, Richard P. Lundstrom, Mark S Ye, Peide D. Xu, Xianfan Anisotropic in-plane thermal conductivity observed in few-layer black phosphorus |
title | Anisotropic in-plane thermal conductivity observed in few-layer black phosphorus |
title_full | Anisotropic in-plane thermal conductivity observed in few-layer black phosphorus |
title_fullStr | Anisotropic in-plane thermal conductivity observed in few-layer black phosphorus |
title_full_unstemmed | Anisotropic in-plane thermal conductivity observed in few-layer black phosphorus |
title_short | Anisotropic in-plane thermal conductivity observed in few-layer black phosphorus |
title_sort | anisotropic in-plane thermal conductivity observed in few-layer black phosphorus |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4634212/ https://www.ncbi.nlm.nih.gov/pubmed/26472191 http://dx.doi.org/10.1038/ncomms9572 |
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