Heterogeneities in systems with quenched disorder

TL;DR

This paper investigates how static structural heterogeneities in a quenched disordered system influence its static and dynamic behaviors, revealing infinite lifetime heterogeneities and spatial pinning effects in a two-dimensional frustrated Ising lattice gas.

Contribution

It demonstrates the impact of quenched disorder on heterogeneity lifetimes and spatial distribution, providing new insights into static and dynamic properties of disordered systems.

Findings

Heterogeneities can have infinite lifetime due to quenched disorder

Spatial heterogeneities are induced by local frustration measures

Quenched disorder affects equilibrium density and correlation functions

Abstract

We study the strong role played by structural (quenched) heterogeneities on static and dynamic properties of the Frustrated Ising Lattice Gas in two dimensions, already in the liquid phase. Differently from the dynamical heterogeneities observed in other glass models in this case they may have infinite lifetime and be spatially pinned by the quenched disorder. We consider a measure of local frustration, show how it induces the appearance of spatial heterogeneities and how this reflects in the observed behavior of equilibrium density distributions and dynamic correlation functions.