Dresden 2020 – scientific programme

The DPG Spring Meeting in Dresden had to be cancelled! Read more ...

Parts | Days | Selection | Search | Updates | Downloads | Help

DY: Fachverband Dynamik und Statistische Physik

DY 56: Poster: Glasses; Granular Matter; Brownian Motion and Anomalous Diffusion

DY 56.8: Poster

Thursday, March 19, 2020, 15:00–18:00, P1A

System size scaling of a model glass under shear — •Moumita Maiti¹, Lawrence Smith², and Andreas Heuer³ — ¹Institute of Physical Chemistry, UNiversity of Muenster, Muenster,Germany — ²Institute of Physical Chemistry, UNiversity of Muenster, Muenster, Germany — ³Institute of Physical Chemistry, UNiversity of Muenster, Muenster, Germany

We simulate a binary Lennard-Jones glass under shear for different system sizes with a very low shear rate at a temperature close to zero. We observe shear bands for larger system sizes. The tails of the Van-Hove function of such samples display a scaling with the system size with an exponent 0.5. We relate the scaling to the presence of activating shear transformation zones (STZs) and speculate about the impact of the coupling of different STZs as the source of these finite size effects. This is further corrobated by analyzing the number of fast moving particles. We anticipate a positive correlation between the number of activated STZs and the number of single particle jumps. We observe that the number of jumps per particle scales with system sizes too but with a different exponent 0.25. We discuss possible reasons for the difference of the two scaling exponents.