English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Open

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

We use molecular dynamic simulations to investigate the relation between thepresence of packing defects in a glass-former and the spontaneous cooperativemotions called dynamic heterogeneity. For that purpose we use a simple diatomicglass-former and add a small number of larger or smaller diatomic probes. Thediluted probes modify locally the packing, inducing structural defects in theliquid, while we find that the number of defects is small enough not to disturbthe average structure. We find that a small packing modification around a fewmolecules can deeply influence the dynamics of the whole liquid, whensupercooled. When we use small probe molecules, the dynamics accelerates andthe dynamic heterogeneity decreases. In contrast, for large probes the dynamicsslows down and the dynamic heterogeneity increases. The induced heterogeneitiesand transport coefficient modification increase when the temperature decreasesand disappear around the onset temperature of the cage dynamics.

How do packing defects modify the cooperative motions in supercooled liquids ?