Hidden Scale Invariance in Polydisperse Mixtures of Exponential Repulsive Particles

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Polydisperse systems of particles interacting by the purely repulsive
exponential (EXP) pair potential are studied in regard to how structure and dynamics
vary along isotherms, isochores, and isomorphs. The sizable size polydispersities of 23%,
29%, 35%, and 40%, as well as energy polydispersity 35%, were considered. For each system
an isomorph was traced out covering about one decade in density. For all systems studied,
the structure and dynamics vary significantly along the isotherms and isochores but are
invariant to a good approximation along the isomorphs. We conclude that the singlecomponent
EXP system’s hidden scale invariance (implying isomorph invariance of
structure and dynamics) is maintained even when a sizable polydispersity is introduced into
the system.
TidsskriftJournal of Physical Chemistry Part B: Condensed Matter, Materials, Surfaces, Interfaces & Biophysical
Udgave nummer1
Sider (fra-til)317-327
Antal sider11
StatusUdgivet - 14 jan. 2021

Bibliografisk note

Funding Information:
This work was supported by the VILLUM Foundation’s Matter Grant 16515.

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