Nonlinear Sciences – Pattern Formation and Solitons
Scientific paper
1996-04-12
Nonlinear Sciences
Pattern Formation and Solitons
27 Revtex pages, 9 figures to appear in Phys. Rev. B
Scientific paper
10.1103/PhysRevB.54.321
Molecular dynamics simulations are used to investigate the atomic mobility and diffusivity of a generalized Frenkel-Kontorova model which takes into account anharmonic (exponential) interaction of atoms subjected to a three-dimensional substrate potential periodic in two dimensions and nonconvex (Morse) in the third dimension. The numerical results are explained by a phenomenological theory which treats a system of strongly interacting atoms as a system of weakly interacting quasiparticles (kinks). Model parameters are chosen close to those for {\bf K}-{\bf W}(112) adsorption system.
Braun Oleg M.
Paliy Maxim V.
Peyrard Michel
Thierry~Dauxois
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