What is it about?
We show how the partial vibrational density of states for amorphous solids can be measured using inelastic neutron scattering with isotope substitution
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Why is it important?
We report a new method to accurately measure an essential parameter for describing the collective excitations in amorphous solids, namely the vibrational density of states for selected elements. Such information is of key importance for understanding the physical properties of amorphous solids, but is extremely difficult to obtain because of their structural disorder. Our methodology employs the method of isotope substitution in inelastic neutron scattering, and is applicable to a broad range of amorphous materials. It delivers results that transcend those obtained from traditional neutron scattering experiments in which the measured spectra are interpreted on the basis of unrealistic assumptions.
Perspectives
The experimental work took advantage of advances in neutron scattering instrumentation at the ISIS pulsed neutron and muon source.
Professor Philip S Salmon
University of Bath
Read the Original
This page is a summary of: Partial vibrational density of states for amorphous solids from inelastic neutron scattering, August 2018, American Physical Society (APS),
DOI: 10.1103/physrevb.98.064205.
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