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Interface Collisions with Diffusive Mass Transport by Bastien Marguet; F. D. A. Aarão Reis; Olivier Pierre-Louis is a Physics and Astronomy article available to read on EtoBox.

What is Interface Collisions with Diffusive Mass Transport about?

We report on a linear Langevin model that describes the evolution of the roughness of two interfaces that move towards each other and are coupled by a diffusion field. This model aims at describing the closing of the gap between two 2D material domains during growth, and the subsequent formation of a rough grain boundary. We assume that deposition occurs in the gap between the two domains and that the growth units diffuse and may attach to the edges of the domains. These units can also detach from edges, diffuse, and reattach elsewhere. For slow growth, the edge roughness increases monotonously and then saturates at some equilibrium value. For fast growth, the roughness exhibits a maximum just before the collision between the two interfaces, which is followed by a minimum. The peak of the roughness can be dominated by statistical fluctuations or by edge instabilities. A phase diagram with three regimes is obtained: Slow growth without peak, peak dominated by statistical fluctuations, and peak dominated by instabilities. These results reproduce the main features observed in kinetic Monte Carlo simulations.

Who reads Interface Collisions with Diffusive Mass Transport?

Author

Bastien Marguet; F. D. A. Aarão Reis; Olivier Pierre-Louis

Publisher

American Physical Society (APS)

Published

2022

Language

EN

Field

Physics and Astronomy (Physical Sciences)