Collective Modes in Strongly Coupled Binary Liquids |
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| Authors: | GJ Kalman Z Donkó P Hartmann KI Golden S Kyrkos |
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| Institution: | 1. Department of Physics, Boston College, Chestnut Hill, MA 02467, USA;2. Research Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, P. O. Box 49, H‐1525 Budapest, Hungary;3. Department of Mathematics and Statistics and Department of Physics, University of Vermont, Burlington, VT 05405, USA;4. Department of Chemistry & Physics, Le Moyne College, 1419 Salt Springs Road, Syracuse, NY 13214, USA |
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| 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) |
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| Keywords: | Binary Yukawa liquids wave dispersion molecular dynamics QLCA |
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