Size distribution of islands according to 2D growth model with 2 kinds of diffusion atoms

TL;DR

This paper investigates how two types of diffusing atoms influence the size distribution and density of 2D islands during growth, using kinetic Monte Carlo simulations and theoretical analysis.

Contribution

It introduces a model incorporating two diffusing atom types and demonstrates their impact on island formation and distribution, validated by both simulation and theory.

Findings

Slow atoms dominate nucleus formation

Atom types affect island size distribution

Theoretical analysis confirms simulation results

Abstract

We simulated the growth of 2D islands with 2 kinds of diffusion atoms using the kinetic Monte- Carlo (kMC) method. As a result, we found that the slow atoms tend to create nuclei and determine the island volume distribution, along with additional properties such as island density. We also conducted a theoretical analysis using the rate equation of the point-island model to confirm these results.