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Time-Resolved X-ray Diffraction Investigation of the Modified Phonon Dispersion in InSb Nanowires.

Jurgilaitis, Andrius LU ; Enquist, Henrik LU ; Andreasson, Pererik LU ; Persson, Anna LU ; Borg, Mattias LU ; Caroff, P; Dick Thelander, Kimberly LU ; Harb, Maher LU ; Linke, Heiner LU and Nüske, Ralf LU , et al. (2014) In Nano Letters 14(2). p.541-546
Abstract
The modified phonon dispersion is of importance for understanding the origin of the reduced heat conductivity in nanowires. We have measured the phonon dispersion for 50 nm diameter InSb (111) nanowires using time-resolved X-ray diffraction. By comparing the sound speed of the bulk (3880 m/s) and that of a classical thin rod (3600 m/s) to our measurement (2880 m/s), we conclude that the origin of the reduced sound speed and thereby to the reduced heat conductivity is that the C44 elastic constant is reduced by 35% compared to the bulk material.
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type
Contribution to journal
publication status
published
subject
in
Nano Letters
volume
14
issue
2
pages
541 - 546
publisher
The American Chemical Society
external identifiers
  • pmid:24387246
  • wos:000331343900022
  • scopus:84894178785
ISSN
1530-6992
DOI
10.1021/nl403596b
language
English
LU publication?
yes
id
3a7ca03a-fab2-4e5b-8fd6-fa17f8e772d8 (old id 4292156)
date added to LUP
2014-03-05 11:16:01
date last changed
2017-05-21 03:06:13
@article{3a7ca03a-fab2-4e5b-8fd6-fa17f8e772d8,
  abstract     = {The modified phonon dispersion is of importance for understanding the origin of the reduced heat conductivity in nanowires. We have measured the phonon dispersion for 50 nm diameter InSb (111) nanowires using time-resolved X-ray diffraction. By comparing the sound speed of the bulk (3880 m/s) and that of a classical thin rod (3600 m/s) to our measurement (2880 m/s), we conclude that the origin of the reduced sound speed and thereby to the reduced heat conductivity is that the C44 elastic constant is reduced by 35% compared to the bulk material.},
  author       = {Jurgilaitis, Andrius and Enquist, Henrik and Andreasson, Pererik and Persson, Anna and Borg, Mattias and Caroff, P and Dick Thelander, Kimberly and Harb, Maher and Linke, Heiner and Nüske, Ralf and Wernersson, Lars-Erik and Larsson, Jörgen},
  issn         = {1530-6992},
  language     = {eng},
  number       = {2},
  pages        = {541--546},
  publisher    = {The American Chemical Society},
  series       = {Nano Letters},
  title        = {Time-Resolved X-ray Diffraction Investigation of the Modified Phonon Dispersion in InSb Nanowires.},
  url          = {http://dx.doi.org/10.1021/nl403596b},
  volume       = {14},
  year         = {2014},
}