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Time-Resolved X-ray Diffraction Investigation of the Modified Phonon Dispersion in InSb Nanowires
Department of Physics & MAX IV Laboratory, Lund University, Lund, Sweden.
MAX IV Laboratory, Lund University, Lund, Sweden.
Department of Physics, Lund University, Lund, Sweden.ORCID iD: 0000-0002-3764-4235
Department of Physics, Lund University, Lund, Sweden.
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2014 (English)In: Nano letters (Print), ISSN 1530-6984, E-ISSN 1530-6992, Vol. 14, no 2, 541-546 p.Article in journal (Refereed) Published
Abstract [en]

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. © 2014 American Chemical Society.

Place, publisher, year, edition, pages
Washington, DC: American Chemical Society (ACS), 2014. Vol. 14, no 2, 541-546 p.
Keyword [en]
elastic properties, indium antimonide, Nanowires, thermal conductivity, time dependent, X-ray diffraction
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:hh:diva-26520DOI: 10.1021/nl403596bISI: 000331343900022PubMedID: 24387246Scopus ID: 2-s2.0-84894178785OAI: oai:DiVA.org:hh-26520DiVA: diva2:747666
Available from: 2014-09-17 Created: 2014-09-17 Last updated: 2017-03-17Bibliographically approved

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