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/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We explore dynamic structural superlubricity for the case of a relativelylarge contact area, where the friction force is proportional to the area(exceeding $\sim 100\,nm^2$) experimentally, numerically, and theoretically. Weuse a setup comprised of two molecular smooth incommensurate surfaces --graphene-covered tip and substrate. The experiments and MD simulationsdemonstrate independence of the friction force on the normal load, for a widerange of normal loads and relative surface velocities. We propose an atomisticmechanism of this phenomenon, associated with synchronic out-of-plane surfacefluctuations of thermal origin, and confirm it by numerical experiments. Basedon this mechanism, we develop a theory for this type of superlubricity and showthat friction force increases linearly with increasing temperature and relativevelocity, for velocities, larger than a threshold velocity. The MD results arein a fair agreement with predictions of the theory.

Atomistic mechanism of friction force independence on the normal load and other friction laws for dynamic structural superlubricity