Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
1999-04-16
Physics
Condensed Matter
Soft Condensed Matter
11 pages, 7 figures; to be published in Phys. Rev. E (1 May 1999)
Scientific paper
10.1103/PhysRevE.59.5706
The colloidal gel and glass transitions are investigated using the idealized mode coupling theory (MCT) for model systems characterized by short-range attractive interactions. Results are presented for the adhesive hard sphere and hard core attractive Yukawa systems. According to MCT, the former system shows a critical glass transition concentration that increases significantly with introduction of a weak attraction. For the latter attractive Yukawa system, MCT predicts low temperature nonergodic states that extend to the critical and subcritical region. Several features of the MCT nonergodicity transition in this system agree qualitatively with experimental observations on the colloidal gel transition, suggesting that the gel transition is caused by a low temperature extension of the glass transition. The range of the attraction is shown to govern the way the glass transition line traverses the phase diagram relative to the critical point, analogous to findings for the fluid-solid freezing transition.
Bergenholtz Johan
Fuchs Madeleine
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