Phononic and structural response to strain in wurtzite-gallium nitride nanowires

Gallium nitride (GaN) nanowires exist in a myriad of cross-sectional shapes. In this study, a series of classical molecular dynamics simulations is performed to investigate the strain-phononics-structure relationship in rectangular and triangular wurtzite-GaN nanowires. The thermal conductivity of t...

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Main Authors: Loh, G. C., Teo, Edwin Hang Tong, Tay, Beng Kang
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2013
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Online Access:https://hdl.handle.net/10356/94810
http://hdl.handle.net/10220/9320
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spelling sg-ntu-dr.10356-948102020-03-07T14:02:42Z Phononic and structural response to strain in wurtzite-gallium nitride nanowires Loh, G. C. Teo, Edwin Hang Tong Tay, Beng Kang School of Electrical and Electronic Engineering DRNTU::Science::Physics Gallium nitride (GaN) nanowires exist in a myriad of cross-sectional shapes. In this study, a series of classical molecular dynamics simulations is performed to investigate the strain-phononics-structure relationship in rectangular and triangular wurtzite-GaN nanowires. The thermal conductivity of the nanowires is linearly dependent on the uniaxial strain in both compressive and tensile regimes, and shows no significant dissimilitude for the same amount of strain exerted on the two types of nanowire. This is coherent with an analytical approach using the Boltzmann transport theory. However, the thermomechanical behaviour at the vertex regions shows palpable differences between the two subfamilies, relative to the non-vertex faceted regions, as the structural morphology is most disparate at the vertices. Furthermore, the degree of strain asymmetry is a strong determinant of the vibrational response and consequently thermal conductance. Published version 2013-03-01T02:45:58Z 2019-12-06T19:02:43Z 2013-03-01T02:45:58Z 2019-12-06T19:02:43Z 2012 2012 Journal Article Loh, G. C., Teo, E. H. T., & Tay, B. K. (2012). Phononic and structural response to strain in wurtzite-gallium nitride nanowires. Journal of applied physics, 111(10), 103506. 0021-8979 https://hdl.handle.net/10356/94810 http://hdl.handle.net/10220/9320 10.1063/1.4716476 en Journal of applied physics © 2012 American Institute of Physics. This paper was published in Journal of Applied Physics and is made available as an electronic reprint (preprint) with permission of American Institute of Physics. The paper can be found at the following official DOI: [http://dx.doi.org/10.1063/1.4716476 ]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Science::Physics
spellingShingle DRNTU::Science::Physics
Loh, G. C.
Teo, Edwin Hang Tong
Tay, Beng Kang
Phononic and structural response to strain in wurtzite-gallium nitride nanowires
description Gallium nitride (GaN) nanowires exist in a myriad of cross-sectional shapes. In this study, a series of classical molecular dynamics simulations is performed to investigate the strain-phononics-structure relationship in rectangular and triangular wurtzite-GaN nanowires. The thermal conductivity of the nanowires is linearly dependent on the uniaxial strain in both compressive and tensile regimes, and shows no significant dissimilitude for the same amount of strain exerted on the two types of nanowire. This is coherent with an analytical approach using the Boltzmann transport theory. However, the thermomechanical behaviour at the vertex regions shows palpable differences between the two subfamilies, relative to the non-vertex faceted regions, as the structural morphology is most disparate at the vertices. Furthermore, the degree of strain asymmetry is a strong determinant of the vibrational response and consequently thermal conductance.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Loh, G. C.
Teo, Edwin Hang Tong
Tay, Beng Kang
format Article
author Loh, G. C.
Teo, Edwin Hang Tong
Tay, Beng Kang
author_sort Loh, G. C.
title Phononic and structural response to strain in wurtzite-gallium nitride nanowires
title_short Phononic and structural response to strain in wurtzite-gallium nitride nanowires
title_full Phononic and structural response to strain in wurtzite-gallium nitride nanowires
title_fullStr Phononic and structural response to strain in wurtzite-gallium nitride nanowires
title_full_unstemmed Phononic and structural response to strain in wurtzite-gallium nitride nanowires
title_sort phononic and structural response to strain in wurtzite-gallium nitride nanowires
publishDate 2013
url https://hdl.handle.net/10356/94810
http://hdl.handle.net/10220/9320
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