Mesoscopic and microscopic modeling of island formation in strained film epitaxy.

摘要: The instability of strained films for island formation is examined through an approach incorporating both discrete microscopic details and continuum mechanics. A linear relationship between the wave number misfit strain found large strains, while only in small limit a crossover to elasticity result obtained. universal scaling relation accommodating all range strains identified. Our results indicate that mechanics may break down even at relatively stress due nature crystalline surfaces.