Reentrance effect in the lane formation of driven colloids.
Recently it has been shown that a strongly interacting colloidal mixture consisting of oppositely driven particles undergoes a nonequilibrium transition towards lane formation provided the driving strength exceeds a threshold value. We predict here a reentrance effect in lane formation: for fixed high driving force and increasing particle densities, there is first a transition towards lane formation which is followed by another transition back to a state with no lanes. Our result is obtained both by Brownian dynamics computer simulations and by a phenomenological dynamical density functional theory.
S. N. Bose National Centre for Basic Sciences, Block-JD, Sector-III, Salt Lake, Calcutta, 700091, India.
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Chakrabarti
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Dzubiella
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Löwen