Berlin 2012 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 59: Complex Materials II

MM 59.5: Vortrag

Donnerstag, 29. März 2012, 18:00–18:15, H 1029

Crowding phenomenon of scattered probe atoms in a Supercooled binary Lennard-Jones mixture — •Imad Ladadwa¹ and Andreas Heuer² — ¹FBSU, 15700 Tabuk, KSA — ²Westfälische Wilhelms-Universität Münster, Institut für physikalische Chemie, Corrensstrasse 30, 48149 Münster, Germany

The crowding effect phenomena have been investigated by performing a molecular dynamics simulation on a three dimensional Lennard-Jones binary mixture. When coupling a small randomly chosen fraction of particles to an external field we observed that these particles tend to form strings. Their sizes strongly depend on the external driving force as well as on the simulation time. This behaviour reflects a crowding effect which resembles an induced effective attraction force acts on the probe atoms and drives them to create a string like structures. The formation of these strings as a collective cooperative motion leads to a significant modification of the non-linear behavior of the velocity-force relation.