SEARCH

SEARCH BY CITATION

Keywords:

  • Binary Yukawa liquids;
  • wave dispersion;
  • molecular dynamics;
  • QLCA

Abstract

We analyze the collective excitations in two- and three-dimensional binary Yukawa systems, consisting of two components with different masses. Theoretical analysis reveals a profound difference between the weakly and strongly correlated limits: at weak coupling the two components interact via the mean field only and the oscillation frequency is governed by the light component. In the strongly correlated limit the mode frequency is governed by the combined mass, where the heavy component dominates. Computer simulations in the full coupling range extend and confirm the theoretical results (© 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)