Composition Patterning in Systems Driven by Competing Dynamics
Materials Science
2007-05-23 v1
Abstract
We study an alloy system where short-ranged, thermally-driven diffusion competes with externally imposed, finite-ranged, athermal atomic exchanges, as is the case in alloys under irradiation. Using a Cahn-Hilliard-type approach, we show that when the range of these exchanges exceeds a critical value, labyrinthine concentration patterns at a mesoscopic scale can be stabilized. Furthermore, these steady-state patterns appear only for a window of the frequency of forced exchanges. Our results suggest that ion beams may provide a novel route to stabilize and tune the size of nanoscale structural features in materials.
Cite
@article{arxiv.cond-mat/9910435,
title = {Composition Patterning in Systems Driven by Competing Dynamics},
author = {Raul A. Enrique and Pascal Bellon},
journal= {arXiv preprint arXiv:cond-mat/9910435},
year = {2007}
}
Comments
Submitted to Phys. Rev. Lett