# Effect of bond-disorder on the phase-separation kinetics of binary mixtures: a Monte Carlo simulation study

## TL;DR

This study uses Monte Carlo simulations to explore how bond-disorder affects phase separation kinetics in binary mixtures, revealing significant changes in dynamical scaling and morphology depending on disorder distribution.

## Contribution

It demonstrates the impact of bond-disorder placement on phase separation dynamics and morphology in binary mixtures, a novel investigation using Monte Carlo methods.

## Key findings

- Dynamical scaling varies with the number and placement of disordered sites.
- Regularly introduced bond-disorder maintains scaling for few disordered sites.
- High disorder leads to lamellar pattern formation.

## Abstract

We present Monte Carlo (MC) simulation studies of phase separation in binary (AB) mixtures with bond-disorder that is introduced in two different ways: (i) at randomly selected lattice sites and (ii) at regularly selected sites. The Ising model with spin exchange (Kawasaki) dynamics represents the segregation kinetics in conserved binary mixtures. We find that the dynamical scaling changes significantly by varying the number of disordered sites in the case where bond-disorder is introduced at the randomly selected sites. On the other hand, when we introduce the bond-disorder in a regular fashion, the system follows the dynamical scaling for the modest number of disordered sites. For higher number of disordered sites, the evolution morphology illustrates a lamellar pattern formation. Our MC results are consistent with the Lifshitz-Slyozov (LS) power-law growth in all the cases.