Example: surface diffusion Na/Cu(100)

Surface diffusion coefficient of sodium atom adsorbed on the Cu(001) surface was evaluated in framework of the model "Stochastic model of surface diffusion". This theory is based on the direct MD simulation of the 2D Langevin equation with a Gaussian random force describing the adatom-phonons interaction. Such an approach is valid if the temperature is large than the characteristic temperature of adatom vibrations in the surface potential well.

The temperature dependence of the surface diffusion Na/Cu(110) plotted on Arrenius axes. The results of calculations are shown by the red line; the experimental data are shown by the blue points.

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