Partial vibrational density of states for amorphous solids from inelastic neutron scattering

Dean A. J. Whittaker, Luigi Giacomazzi, Devashibhai Adroja, Stephen M. Bennington, Alfredo Pasquarello, Philip S. Salmon

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We introduce coherent inelastic neutron scattering with isotope substitution as a technique for measuring site-specific information on the vibrational dynamics of amorphous solids. The technique is used to extract experimentally the partial vibrational density of states Gα(E) for both Ge and Se in the prototypical networkforming glass GeSe2, whereα specifies the chemical species and E denotes the energy. The efficacy of the approximationsusedininterpretingtheexperimentaldataisvalidatedbyusingafirst-principlesmodel,forwhich the set of true partial vibrational density of states is directly accessible. Our approach offers an opportunity for exploring accurately the vibrational dynamics of disordered materials.
Original languageEnglish
Article number064205
Pages (from-to)1-10
Number of pages10
JournalPhysical Review B
Volume98
Issue number6
DOIs
Publication statusPublished - 23 Aug 2018

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Inelastic neutron scattering
inelastic scattering
neutron scattering
Isotopes
Substitution reactions
isotopes
substitutes
Glass
glass
energy

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Whittaker, D. A. J., Giacomazzi, L., Adroja, D., Bennington, S. M., Pasquarello, A., & Salmon, P. S. (2018). Partial vibrational density of states for amorphous solids from inelastic neutron scattering. Physical Review B, 98(6), 1-10. [064205]. https://doi.org/10.1103/PhysRevB.98.064205

Partial vibrational density of states for amorphous solids from inelastic neutron scattering. / Whittaker, Dean A. J.; Giacomazzi, Luigi; Adroja, Devashibhai; Bennington, Stephen M.; Pasquarello, Alfredo; Salmon, Philip S.

In: Physical Review B, Vol. 98, No. 6, 064205, 23.08.2018, p. 1-10.

Research output: Contribution to journalArticle

Whittaker, DAJ, Giacomazzi, L, Adroja, D, Bennington, SM, Pasquarello, A & Salmon, PS 2018, 'Partial vibrational density of states for amorphous solids from inelastic neutron scattering', Physical Review B, vol. 98, no. 6, 064205, pp. 1-10. https://doi.org/10.1103/PhysRevB.98.064205
Whittaker, Dean A. J. ; Giacomazzi, Luigi ; Adroja, Devashibhai ; Bennington, Stephen M. ; Pasquarello, Alfredo ; Salmon, Philip S. / Partial vibrational density of states for amorphous solids from inelastic neutron scattering. In: Physical Review B. 2018 ; Vol. 98, No. 6. pp. 1-10.
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