Regensburg 2013 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 17: Glasses II (joint session DY/DF/CPP)

CPP 17.8: Talk

Tuesday, March 12, 2013, 11:30–11:45, H46

Multiple reentrant glass transitions of soft spheres at high densities — •Michael Schmiedeberg — Institut für Theoretische Physik 2: Weiche Materie, Heinrich-Heine-Universität Düsseldorf, 40204 Düsseldorf, Germany

We study the dynamics of soft spheres by using Molecular Dynamics simulations. The relaxation time varies non-monotonically as a function of density at constant temperature (cf. [1,2]). We determine and study the jamming phase diagrams that indeed show multiple reentrant glass transitions if temperature and density are used as control parameters. However, if we switch to a new formulation of the jamming phase diagrams [3], where temperature over pressure and pressure are employed as control parameters, no non-monotonic behavior can be observed.

[1] L. Berthier, A.J. Moreno, and G. Szamel, Phys. Rev. E 82, 060501(R) (2010).

[2] M. Pica Ciamarra and P. Sollich, arXiv:1209.3334.

[3] T.K. Haxton, M. Schmiedeberg, and A.J. Liu, Phys. Rev. E 83, 031503 (2011).