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MM: Fachverband Metall- und Materialphysik

MM 16: Topical Session: Thermophysical Properties of Bulk Metallic Glasses and Bulk Metallic Glass-forming Liquids

MM 16.1: Topical Talk

Mittwoch, 19. März 2025, 10:15–10:45, H10

Microstructure and transport in model isotropic amorphous solids — •Peter Derlet — Condensed Matter Theory Group, Paul Scherrer Institut, Switzerland

Amorphous solids lack long range order, however structural heterogeneity can exist over intermediate length scales suggesting the notion of a glassy microstructure. Such spatial variations, whatever they may be, can also be related to variations in thermally driven structural fluctuation time scales. In this talk, I will present atomistic simulations of model isotropic (metallic) binary glass systems spanning the microsecond timescale, and discuss the resulting amorphous structure in terms of bond frustration, demonstrating that despite the strong disorder, a percolative region containing strong medium range order emerges that fundamentally affects transport and dissipation. Particular focus will be given to how such simulations can give insight into experiments probing arrested colloidal glasses obtained through isotropic compression, and structural decorrelation in a metallic glass probed by long-time x-ray photon correlation measurements.

Keywords: Bulk Metallic Glasses; Microstructure; Transport