Density oscillations in multi-component molecular mixtures

Details Density oscillations in multi-component molecular mixtures Density oscillations in multi-component molecular mixtures

2008-03-20

arxiv.org/abs/0803.2950v1

Physics

Condensed Matter

Statistical Mechanics

7 pages, 1 figure

Scientific paper

The excitation spectrum of the density collective oscillations is computed for multi-component molecular mixtures both with Coulomb and (repulsive) short-range interactions. Distinct sound-like excitations appear, governed by the short-range interaction, which differ from the ordinary hydrodynamic sound. The dielectric function and the structure factor are also calculated. The "two-sounds phenomenon" can be understood by means of the predictions of this model.

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