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The European Physical Journal B
ISSN: 1434-6028 (printed version)
ISSN: 1434-6036 (electronic version)
Abstract Volume 5 Issue 4 (1998) pp 839-846
The phonon dispersion in 6H-SiC investigated by inelastic neutron scattering
B. Dorner (1) (a), H. Schober (1), A. Wonhas (1), M. Schmitt (2), D. Strauch (2)
(1) Institut Laue-Langevin, 38042 Grenoble, France
(2) Institut für Theoretische Physik, Universität Regensburg, 93040 Regensburg, Germany
Received: 28 April 1998 / Accepted: 15 June 1998
Abstract: Using coherent inelastic neutron scattering we have investigated the phonon dispersion relation of bulk hexagonal 6H-SiC. The complete set of phonon branches has been determined along the $\Gamma {-}A$ and 14 out of 36 branches along the $\Gamma{-}M$ direction. The experimental data are compared to ab initio calculations for cubic 3C-SiC transposed to 6H-SiC. Good agreement between theory and experiment is found for the $\Gamma {-}A$direction. The discrepancies encountered for the $\Gamma{-}M$ direction are interpreted as evidence for a dependence of the dynamical response in the SiC system on the stacking sequence.
PACS. 63.20.-e Phonons in crystal lattices[:AND:] 78.70.Nx Neutron inelastic scattering
(a) email: dorner@ill.fr
Article in PDF format (327 KB)
Online publication: October 29, 1998
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