Superdiffusion in quasi-two-dimensional Yukawa liquids

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T. Ott and M. Bonitz
Christian-Albrechts-Universität zu Kiel, Institut für Theoretische Physik und Astrophysik, Leibnizstraße 15, 24098 Kiel, Germany

Z. Donkó and P. Hartmann
Research Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, P.O. Box 49, H-1525 Budapest, Hungary

Received 4 June 2008; published 19 August 2008

Theemergence and vanishing of superdiffusion in quasi-two-dimensional Yukawa systems areinvestigated by molecular dynamics simulations. Using both the asymptotic behaviorof the mean-squared displacement of the particles and the long-timetail of the velocity autocorrelation function as indicators of superdiffusion,we confirm the existence of a transition from normal diffusionto superdiffusion in systems changing from a three-dimensional to atwo-dimensional character. A connection between superdiffusion and dimensionality is establishedby the behavior of the projected pair distribution function.

URL:	http://link.aps.org/doi/10.1103/PhysRevE.78.026409
DOI:	10.1103/PhysRevE.78.026409
PACS:	52.27.Gr; 52.27.Lw; 82.70.Dd; 66.10.cg 52.27.Gr Strongly-coupled plasmas 52.27.Lw Dusty or complex plasmas; plasma crystals 82.70.Dd Colloids 66.10.cg Mass diffusion in liquids YEAR: 2008
KEYWORDS:	diffusion, molecular dynamics method

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