TY - JOUR
T1 - Partial vibrational density of states for amorphous solids from inelastic neutron scattering
AU - Whittaker, Dean A. J.
AU - Giacomazzi, Luigi
AU - Adroja, Devashibhai
AU - Bennington, Stephen M.
AU - Pasquarello, Alfredo
AU - Salmon, Philip S.
PY - 2018/8/23
Y1 - 2018/8/23
N2 - 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.
AB - 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.
U2 - 10.1103/PhysRevB.98.064205
DO - 10.1103/PhysRevB.98.064205
M3 - Article
VL - 98
SP - 1
EP - 10
JO - Physical Review B : Condensed Matter and Materials Physics
JF - Physical Review B : Condensed Matter and Materials Physics
SN - 1098-0121
IS - 6
M1 - 064205
ER -
