Volume 66, Number 2, April 2004
|Page(s)||246 - 252|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 April 2004|
Low-frequency structural dynamics in the incommensurate composite crystal
Laboratoire Léon Brillouin, CEA-CNRS, CE Saclay - 91191 Gif-sur-Yvette, France
2 Groupe Matière Condensée et Matériaux, UMR au CNRS 6626 Université de Rennes I - 35042 Rennes Cedex, France
3 Max-Planck-Institut für Festkörperforschung - 70569 Stuttgart, Germany
Accepted: 6 February 2004
Inelastic coherent neutron scattering experiments have been performed to study the low-frequency structural excitations in single crystals of the incommensurate superconducting (-2201) system. As in the -2212 family, the observation of two well-defined propagating “acoustic-like” branches around the main Bragg reflections reflects its composite nature. The two modes naturally correspond to the separate motions of the two sublattices. Constant-Q scans reveal a rapid evolution of the dynamical structure factor with the wave vector.
PACS: 61.44.Fw – Incommensurate crystals / 63.20.Dj – Phonon states and bands, normal modes, and phonon dispersion / 61.12.-q – Neutron diffraction and scattering
© EDP Sciences, 2004
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.