Phase behaviour of a hard sphere colloidal system in the presence of an external laser field

Details Phase behaviour of a hard sphere colloidal system in the presence of an external laser field Phase behaviour of a hard sphere colloidal system in the presence of an external laser field

2000-12-18

arxiv.org/abs/cond-mat/0012338v1

Physics

Condensed Matter

13 pages including 6 figures, submitted to European Physical Journal E

Scientific paper

We study the phase behaviour of a two-dimensionally confined hard sphere colloidal system in the presence of a periodic light field of two interfering laser beams using Monte Carlo simulations. For a given packing fraction of the particles, the colloidal system undergoes a transition from a modulated liquid to a modulated crystal as the light intensity is increased, corresponding to laser induced freezing. For certain packing fractions of the colloidal particles, the system again becomes a modulated liquid as the field strength crosses a threshold value, showing a re-entrant behaviour.

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