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Title: Lattice dynamics in elemental modulated Sb 2 Te 3 films: Lattice dynamics in elemental modulated Sb 2 Te 3 films

We investigate the crystallinity and the lattice dynamics in elemental modulated Sbinline imageTeinline image films microscopically using high energy synchrotron radiation diffraction combined with inline imageSb nuclear inelastic scattering. The correlation length is found to be finite but less than 100 . Moreover, the element specific density of phonon states is extracted. A comparison with the element specific density of phonon states in bulk Sbinline imageTeinline image confirms that the main features in the density of phonon states arise from the layered structure. The average speed of sound at inline image inline image, is almost the same compared to bulk Sbinline imageTeinline image at inline image, inline image. Similarly, the change in the acoustic cut-off energy is within the experimental detection limit. Therefore, we suggest that the lattice thermal conductivity in elemental modulated Sbinline imageTeinline image films should not be significantly changed from its bulk value.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [2] ;  [4]
  1. Julich Research Centre (Germany); Univ. of Liege, (Belgium); European Synchrotron Radiation Facility (ESRF), Grenoble (France)
  2. Fraunhofer Institute for Physical Measurement Techniques IPM (Germany)
  3. European Synchrotron Radiation Facility (ESRF), Grenoble (France); German Electron Synchrotron, Hamburg (Germany)
  4. Julich Research Centre (Germany); Univ. of Liege, (Belgium)
Publication Date:
OSTI Identifier:
1265736
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Physica Status Solidi. A, Applications and Materials Science
Additional Journal Information:
Journal Volume: 213; Journal Issue: 3; Journal ID: ISSN 1862-6300
Publisher:
Wiley
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE lattice dynamics; elemental modulated; Sb2Te3 films