Time-resolved X-ray diffraction investigation of the modified phonon dispersion in InSb nanowires

A. Jurgilaitis; H. Enquist; B. P. Andreasson; A. I.H. Persson; B. M. Borg; P. Caroff; K. A. Dick; M. Harb; H. Linke; R. Nüske; L. E. Wernersson; J. Larsson

doi:10.1021/nl403596b

Time-resolved X-ray diffraction investigation of the modified phonon dispersion in InSb nanowires

A. Jurgilaitis, H. Enquist, B. P. Andreasson, A. I.H. Persson, B. M. Borg, P. Caroff, K. A. Dick, M. Harb, H. Linke, R. Nüske, L. E. Wernersson, J. Larsson^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

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.

Original language	English
Pages (from-to)	541-546
Number of pages	6
Journal	Nano Letters
Volume	14
Issue number	2
DOIs	https://doi.org/10.1021/nl403596b
Publication status	Published - 12 Feb 2014

Access to Document

10.1021/nl403596b

Cite this

@article{359506ab066e43c092fce6e2b2a23890,

title = "Time-resolved X-ray diffraction investigation of the modified phonon dispersion in InSb nanowires",

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.",

keywords = "Nanowires, X-ray diffraction, elastic properties, indium antimonide, thermal conductivity, time dependent",

author = "A. Jurgilaitis and H. Enquist and Andreasson, {B. P.} and Persson, {A. I.H.} and Borg, {B. M.} and P. Caroff and Dick, {K. A.} and M. Harb and H. Linke and R. N{\"u}ske and Wernersson, {L. E.} and J. Larsson",

year = "2014",

month = feb,

day = "12",

doi = "10.1021/nl403596b",

language = "English",

volume = "14",

pages = "541--546",

journal = "Nano Letters",

issn = "1530-6984",

publisher = "American Chemical Society",

number = "2",

}

TY - JOUR

T1 - Time-resolved X-ray diffraction investigation of the modified phonon dispersion in InSb nanowires

AU - Jurgilaitis, A.

AU - Enquist, H.

AU - Andreasson, B. P.

AU - Persson, A. I.H.

AU - Borg, B. M.

AU - Caroff, P.

AU - Dick, K. A.

AU - Harb, M.

AU - Linke, H.

AU - Nüske, R.

AU - Wernersson, L. E.

AU - Larsson, J.

PY - 2014/2/12

Y1 - 2014/2/12

N2 - 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.

AB - 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.

KW - Nanowires

KW - X-ray diffraction

KW - elastic properties

KW - indium antimonide

KW - thermal conductivity

KW - time dependent

UR - http://www.scopus.com/inward/record.url?scp=84894178785&partnerID=8YFLogxK

U2 - 10.1021/nl403596b

DO - 10.1021/nl403596b

M3 - Article

SN - 1530-6984

VL - 14

SP - 541

EP - 546

JO - Nano Letters

JF - Nano Letters

IS - 2

ER -

Time-resolved X-ray diffraction investigation of the modified phonon dispersion in InSb nanowires

Abstract

Access to Document

Other files and links

Fingerprint

Cite this