RT info:eu-repo/semantics/article
T1 Investigating surface dynamics with inelastic x-ray scattering
A1 Murphy, B M
A1 Müller, M
A1 Stettner, J
A1 Requardt, H
A1 Krisch, M
A1 Press, W
A1 Serrano Gutiérrez, Jorge
AB 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.
PB Institute of Physics
SN 0953-8984
YR 2008
FD 2008
LK https://uvadoc.uva.es/handle/10324/65307
UL https://uvadoc.uva.es/handle/10324/65307
LA eng
NO J. Phys.: Condens. Matter 20 224001 (2008)
DS UVaDOC
RD 06-ago-2024