Regensburg 2013 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 6: Glasses and Glass Transition (joint session DY/CPP) I
DY 6.7: Vortrag
Montag, 11. März 2013, 16:45–17:00, H34
Multiple reentrant glass transitions in confined hard-sphere glasses — •Suvendu Mandal1,2, Simon Lang3, Rolf Schilling4, Vitalie Botan4, Martin Oettel4, Dierk Raabe1, Thomas Franosch3, and Fathollah Varnik1,2 — 1Max-Planck Institut fur Eisenforschung, Max-Planck Str. 1, 40237 Dusseldorf, Germany — 2Interdisciplinary Centre for Advanced Materials Simulation (ICAMS), Ruhr-Universitat Bochum, Stiepeler Strasse 129, 44801 Bochum, Germany — 3Institut fur Theoretische Physik, Friedrich-Alexander-Universitat Erlangen-Nurnberg, Staudtstraße 7, 91058, Erlangen, Germany — 4Institut fur Physik, Johannes Gutenberg-Universitat Mainz, Staudinger Weg 7, 55099 Mainz, Germany
We perform molecular dynamics simulations for a polydisperse, densely packed hard-sphere fluid confined between two parallel walls [1]. The diffusion coefficient parallel to the walls is observed to vary by orders of magnitudes upon changing the wall separation while keeping the packing fraction fixed. A striking multiple reentrance scenario emerges for the transition from liquid to glass as the wall separation becomes comparable to the particle diameter. The non-monotonic behavior of the phase diagram is rationalized in terms of a numerical solution of a recently developed mode-coupling theory [1,2].
[1] S. Mandal, S. Lang, R. Schilling, V. Botan, M. Oettel, D. Raabe, T. Franosch, and F. Varnik submitted [2] S. Lang, V. Botan, M. Oettel, D. Hajnal, T. Franosch, R. Schilling PRL 105, 125701 (2010).