Phonon spectroscopy in a Bi2Te3 nanowire array

Bessas D, Toellner W, Aabdin Z, Peranio N, Sergueev I, Wille HC, Eibl O, Nielsch K, Hermann RP (2013)

Publication Type: Journal article

Publication year: 2013

Journal

Nanoscale Royal Society of Chemistry

Book Volume: 5

Pages Range: 10629-10635

Journal Issue: 21

DOI: 10.1039/c3nr02918b

Abstract

The lattice dynamics in an array of 56 nm diameter Bi2Te 3 nanowires embedded in a self-ordered amorphous alumina membrane were investigated microscopically using 125Te nuclear inelastic scattering. The element specific density of phonon states is measured on nanowires in two perpendicular orientations and the speed of sound is extracted. Combined high energy synchrotron radiation diffraction and transmission electron microscopy was carried out on the same sample and the crystallinity was investigated. The nanowires grow almost perpendicular to the c-axis, partly with twinning. The average speed of sound in the 56 nm diameter Bi 2Te3 nanowires is ∼7% smaller with respect to bulk Bi2Te3 and a decrease in the macroscopic lattice thermal conductivity by ∼13% due to nanostructuration and to the reduced speed of sound is predicted. © 2013 The Royal Society of Chemistry.

Involved external institutions

Forschungszentrum Jülich / Research Centre Jülich (FZJ) DE Germany (DE) Universität Hamburg (UHH) DE Germany (DE) Eberhard Karls Universität Tübingen DE Germany (DE) European Synchrotron Radiation Facility (ESRF) FR France (FR) Deutsches Elektronen-Synchrotron DESY DE Germany (DE)

How to cite

APA:

Bessas, D., Toellner, W., Aabdin, Z., Peranio, N., Sergueev, I., Wille, H.-C.,... Hermann, R.P. (2013). Phonon spectroscopy in a Bi2Te3 nanowire array. Nanoscale, 5(21), 10629-10635. https://dx.doi.org/10.1039/c3nr02918b

MLA:

Bessas, Dimitrios, et al. "Phonon spectroscopy in a Bi2Te3 nanowire array." Nanoscale 5.21 (2013): 10629-10635.

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