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Título
Investigating surface dynamics with inelastic x-ray scattering
Año del Documento
2008
Editorial
Institute of Physics
Documento Fuente
J. Phys.: Condens. Matter 20 224001 (2008)
Resumo
A brief overview of application of the grazing incidence inelastic x-ray scattering experimental method will be presented. Inelastic x-ray scattering in grazing incidence conditions provides a new tool for selectively studying both surface and bulk lattice dynamics in a single experiment. It is possible to study acoustic and optical surface phonon modes currently with a 3 meV resolution over a wide range of momentum space and make a direct comparison between surface and bulk dispersion. In particular the case of 2H-NbSe2 will be discussed. For this material a Kohn anomaly has been previously reported. Our data demonstrate that the softening of the Kohn anomaly at the 2H-NbSe2 surface is significantly greater than that reported for the bulk. This is an indication of a relaxation in the topmost layers of the crystal.
ISSN
0953-8984
Revisión por pares
SI
Idioma
eng
Tipo de versión
info:eu-repo/semantics/publishedVersion
Derechos
openAccess
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Formato:
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