Phase Separation under Ultra-Slow Cooling: Onset of Nucleation

Details Phase Separation under Ultra-Slow Cooling: Onset of Nucleation Phase Separation under Ultra-Slow Cooling: Onset of Nucleation

2008-03-15

arxiv.org/abs/0803.2290v1

Physics

Condensed Matter

Statistical Mechanics

(9 pages, 7 figures)

Scientific paper

10.1063/1.2989797

We discuss the interplay between a slow continuous drift of temperature, which induces continuous phase separation, and the non-linear diffusion term in the $\phi^4$-model for phase separation of a binary mixture. This leads to a bound for the stability of diffusive demixing. It is argued that these findings are not specific to the $\phi^4$ model, but that they always apply up to slight modifications of the bound. In practice stable diffusive demixing can only be achieved when special precautions are taken in experiments on real mixtures. Therefore, the recent observations on complex dynamical behavior in such systems should be considered as a new challenge for understanding generic features of phase-separating systems.

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