The partial dynamical structure factors and vibrational density of states in network glasses

DOI

We wish to measure the partial dynamical structure factors and the partial vibrational density of states (VDOS) for the archetypal network forming glass GeSe2 by using the method of isotope substitution in neutron scattering and the MERLIN spectrometer. Essentially, by averaging the separated Ge-Ge and Se-Se partial dynamical structure factors over Q, it is possible to obtain the exact VDOS for Ge and Se, respectively. The work builds on an initial test experiment using MERLIN (RB920266) where there was a substantial background scattering problem associated with use of an Al cryostat tail. Instead, in the new experiment, a ¿cold finger¿ will be used to remove this background scattering problem while still giving access to low temperatures. This is important to ensure that the harmonic approximation is valid and to minimise the multi-phonon contribution to the sample scattering.

Identifier
DOI https://doi.org/10.5286/ISIS.E.24086022
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/24086022
Provenance
Creator Professor Phil Salmon; Mr Dean Whittaker; Professor Steve Bennington; Dr Anita Zeidler
Publisher ISIS Neutron and Muon Source
Publication Year 2014
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Photon- and Neutron Geosciences
Temporal Coverage Begin 2011-05-16T08:52:16Z
Temporal Coverage End 2011-05-25T04:04:25Z