1203.2812 (Nicolas Combe et al.)

Unidimensional model of the ad-atom diffusion on a substrate submitted
to a standing acoustic wave II. Solutions of the ad-atom motion equation    [PDF]

Nicolas Combe, C. Taillan, J. Morillo

The ad-atom dynamic equation, a Langevin type equation is analyzed and solved using some non-linear analytical and numerical tools. We noticeably show that the effect of the surface acoustic wave is to induce an effective potential that governs the diffusion of the ad-atom: the minima of this effective potential correspond to the preferential sites in which the ad-atom spends more time. The strength of this effective potential is compared to the destructuring role of the thermal diffusion and to the crystalline potential induced by the substrate.

View original: http://arxiv.org/abs/1203.2812