BPCPPDYSOE21 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 21: Glasses and Glass Transition 2 (joint session DY/CPP)

CPP 21.6: Vortrag

Mittwoch, 24. März 2021, 12:40–13:00, DYc

The dynamics of a glassforming Lennard-Jones system below the critical mode-coupling temperature — •Juergen Horbach — Heinrich Heine-Universitaet, Duesseldorf, Germany

We present molecular dynamics (MD) computer simulations of a polydisperse glassforming Lennard-Jones model. The equation of state of this model is very similar to that of the Kob-Andersen binary Lennard-Jones (KABLJ) mixture. At a comparable density, also the critical mode coupling temperature is similar as in the KABLJ mixture. Using the swap Monte Carlo technique in combination with MD, we are able to equilibrate supercooled liquids far below the critical mode coupling temperature. We analyze the properties of these deeply supercooled samples with respect to their dynamics in the beta relaxation regime and their response to external shear. In particular, we find the formation of shear bands at sufficiently low shear rates.