Unidimensional model of adatom diffusion on a substrate submitted to a standing acoustic wave. II. Solutions of the adatom motion equation | Zendy

C. Taillan | Zendy; Nicolas Combe | Zendy; J. Morillo | Zendy

Open Access

Unidimensional model of adatom diffusion on a substrate submitted to a standing acoustic wave. II. Solutions of the adatom motion equation

Author(s) -

C. Taillan,

Nicolas Combe,

J. Morillo

Publication year - 2012

Publication title -

physical review b

Language(s) - English

Resource type - Journals

eISSN - 1538-4489

pISSN - 1098-0121

DOI - 10.1103/physrevb.85.155421

Subject(s) - diffusion , maxima and minima , langevin equation , surface diffusion , substrate (aquarium) , diffusion equation , nonlinear system , equations of motion , condensed matter physics , physics , materials science , statistical physics , classical mechanics , chemistry , mathematical analysis , thermodynamics , mathematics , quantum mechanics , oceanography , economy , adsorption , service (business) , economics , geology

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.

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