Journal
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
Volume 250, Issue 7, Pages 1300-1307Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssb.201248412
Keywords
chalcogenides; phonons; structure; sound velocity
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Funding
- Federal Ministry for Education and Research of Germany (BMBF) [03X3540]
- Helmholtz Gemeinschaft Deutscher Forschungzentren [VH NG-407]
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The lattice dynamics in the IV-VI compounds GeTe, SnTe and PbTe were studied by Te-125 and Sn-119 nuclear inelastic scattering and the obtained partial density of phonon states were compared with published theoretical calculations. The phase purity and structure were characterized by high energy X-ray diffraction. The effect of the atomic arrangement, rhombohedral for GeTe and cubic for SnTe and PbTe, is visible in the density of phonon states. Vibrational properties are found to be in good agreement with available calculated data and the softer character of the NaCl-type structures in comparison with the rhombohedral GeTe is confirmed. (C) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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