Microscopic Dynamics of Liquid Aluminum Oxide
- 28 March 2003
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 299 (5615) , 2047-2049
- https://doi.org/10.1126/science.1080950
Abstract
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 vectorsQ (1 to 6 nanometers−1) and a single quasi-elastic peak at higher Q. The high-Qspectra are well described by kinetic theory. The low-Qspectra require a frequency-dependent viscosity and provide previously unknown experimental constraints on the behavior of liquids at the interface between atomistic and continuum theory.Keywords
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