期刊
PHYSICAL REVIEW LETTERS
卷 84, 期 13, 页码 2885-2888出版社
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.84.2885
关键词
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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.
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