Microscopic dynamics of liquid aluminum oxide.
Collective excitations have been observed in liquid aluminum oxide at high temperatures by combining a containerless sample environment with inelastic x-ray scattering. The excitation spectra show a well-defined triplet peak structure at lower wave vectors Q (1 to 6 nanometers-1) and a single quasi-elastic peak at higher Q. The high-Q spectra are well described by kinetic theory. The low-Q spectra require a frequency-dependent viscosity and provide previously unknown experimental constraints on the behavior of liquids at the interface between atomistic and continuum theory.
Sinn
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H
Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA.
Glorieux
B
B
Hennet
L
L
Alatas
A
A
Hu
M
M
Alp
E E
EE
Bermejo
F J
FJ
Price
D L
DL
Saboungi
M-L
ML