Density fluctuations in classical monatomic liquids
- 31 December 1971
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 4 (18) , 3057-3064
- https://doi.org/10.1088/0022-3719/4/18/011
Abstract
A simple form for the generalized density susceptibility for k approximately 0.5 AA-1 and omega approximately 1013s-1 is proposed for monatomic liquids which has the merit of satisfying certain sum rules and limits. It is shown to give a good description of the current correlation observed by Rahman (1968) in a molecular dynamics study of argon at 76 K. Moreover at small wavevectors a triple peak structure is obtained with the frequency of the collective excitation in good agreement with a molecular dynamics study of argon by Kurkijarvi, Levesque and Verlet (1968).Keywords
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