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Collective excitations in dynamics of liquids: a “toy” dynamical model for binary mixtures
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10.1063/1.2781507
/content/aip/journal/ltp/33/9/10.1063/1.2781507
http://aip.metastore.ingenta.com/content/aip/journal/ltp/33/9/10.1063/1.2781507
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Figures

Image of FIG. 1.
FIG. 1.

Imaginary parts (dispersion) of propagating eigenmodes, obtained by the 8-variable treatment of collective dynamics in molten NaI at (symbols “+” connected by interpolation line) and as analytical solutions (14) within the “elastic” four-variable model (unfilled boxes).

Image of FIG. 2.
FIG. 2.

Frequencies of “bare” propagating collective modes independence on the mass ratio for Lennard-Jones equimolar systems with identical mass-density.22 The dispersion lines, corresponding to the same mass ratio, are shown by the same line-connected symbols.

Image of FIG. 3.
FIG. 3.

Dependence of matrix elements of generalized kinetic matrix on the mass ratio for small wave numbers. The mass ratio values were sampled for the same systems as in the previous Figure.

Image of FIG. 4.
FIG. 4.

Frequencies of “bare” propagating collective modes independence on the composition for Lennard-Jones systems with the same density for the mass ratio . Dispersion lines, corresponding to the same concentration, are shown by the same line-connected symbols. Labels denote the molar concentration of the heavy component.

Image of FIG. 5.
FIG. 5.

Mode contributions from the low- and high-frequency branches of “bare” propagating collective modes to the spectral function .

Image of FIG. 6.
FIG. 6.

Mode contributions from the low- and high-frequency branches of “bare” propagating collective modes to the spectral function .

Image of FIG. 7.
FIG. 7.

Crossover region between the “coherent” and “partial” dynamics for two values of the mass ratio.

Image of FIG. 8.
FIG. 8.

Dependence of crossover region on the mass ratio .

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/content/aip/journal/ltp/33/9/10.1063/1.2781507
2007-09-01
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Collective excitations in dynamics of liquids: a “toy” dynamical model for binary mixtures
http://aip.metastore.ingenta.com/content/aip/journal/ltp/33/9/10.1063/1.2781507
10.1063/1.2781507
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