Simulation of self-assembled nanopatterns in strained 2D alloys on the face centered cubic (111) surface

Abstract

Simulation of self-assembled nanopatterns in strained 2D alloys on the face centered cubic (111) surface Weber, S.; Biehl, M.; Kotrla, M.; Kinzel, W. Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. AbstractWe investigate the formation of nanostructures in 2D strained alloys on face centered cubic (111) surfaces by means of equilibrium Monte Carlo simulations. In the framework of an off-lattice model, we consider one monolayer of two bulk-immiscible adsorbates A and B with negative and positive misfit relative to the substrate, respectively. Simulations show that the adsorbates partly self-organize into island or stripe-like patterns. We show how these structures depend on the relative misfits, interaction, and concentration of components. The morphology is quite different for phase separation and intermixing regimes.

Far-from-equilibrium film growth on alloy surfaces: Ni and Al on NiAl(110)

“…3 Other studies of alloy overlayers and films (A+B on A or on C) have either focused on near-equilibrium short-range order 4,5 or on pattern formation reflecting interplay between chemical interactions and strain. 6 There has also been extensive interest in the competition during deposition between alloy ordering and either island growth [7][8][9][10][11] or kinetic roughening 12,13 often in the case where strain is not significant. Unfortunately, such investigations invariably used idealized models with generic Metropolistype prescriptions of diffusion dynamics which cannot capture system-specific non-equilibrium behavior.…”

Role of range of interactions in a model of diffusing charged particles

“…Understanding basic mechanisms of such processes was always important, as it describes motion of adatoms or ions on surfaces. It became recently even more so with the growing interest in nanostructures [3]. Diffusion of particles on a substrate is a cooperative phenomenon resulting from interactions among many particles, particles with a substrate and from thermal excitations, Theoretical papers devoted to these problems are many.…”