Higher-order glass-transition singularities in colloidal systems attractive

The transition from a liquid to a glass in colloidal suspensions of particles interacting through a hard core plus an attractive square-well potential is studied within the rnode-coupling-theory framework. When the width of the attractive potential is much shorter than the hard-core diameter, a reentrant behavior of the liquid-glass line and a glass-glass-transition line are found in the temperature-density plane of the model. For small well-width values, the glass-glass-transition line terminates in a third-order bifurcation point, i.e., in a A3 (cusp) singularity. On increasing the square-well width, the glass-glass line disappears, giving rise to a fourthorder A4 (swallow-tail) singularity at a critical well width. Close to the A3 and A4 singularities the decay of the density correlators shows stretching of huge dynamical windows, in particular logarithmic time dependence. © 2000 The American Physical Society.

Published in:
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 63, 1 I, 0114011-01140117
15393755 15502376
Other identifiers:
Scopus: 2-s2.0-0008659938
Scopus: 2-s2.0-0008659938

 Record created 2010-01-27, last modified 2018-01-28

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