Collective excitations in dynamics of liquids: a "toy" dynamical model for binary mixtures

Автор(и)

  • T. Bryk Institute for Condensed Matter Physics of National Academy of Sciences of Ukraine 1 Svientsitskii Str., Lviv 79011, Ukraine
  • I.M. Mryglod Institute for Condensed Matter Physics of National Academy of Sciences of Ukraine 1 Svientsitskii Str., Lviv 79011, Ukraine

DOI:

https://doi.org/10.1063/1.2781507

Ключові слова:

collective excitations, dispersion law, binary liquids, molecular dynamics.

Анотація

We propose a new «toy» dynamical model that permits us to derive analytical expressions for dispersion of two branches of «bare» propagating collective excitations in binary disordered systems in the whole range of wavenumbers. These expressions are used for the analysis of dependence of dispersion curves on mass ratio and concentration at fixed density of the system. An effect of hybridization of two branches is discussed in terms of mode contributions to time correlation functions. This allows us to estimate the regions with dominant types of coherent or partial dynamics.

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Опубліковано

2007-08-10

Як цитувати

(1)
Bryk, T.; Mryglod, I. Collective Excitations in Dynamics of Liquids: a "toy" Dynamical Model for Binary Mixtures. Fiz. Nizk. Temp. 2007, 33, 1036-1044.

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