Mobility and diffusivity in a generalized Frenkel-Kontorova model
patt-sol
2015-04-09 v1 mtrl-th
Pattern Formation and Solitons
Abstract
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.
Cite
@article{arxiv.patt-sol/9604003,
title = {Mobility and diffusivity in a generalized Frenkel-Kontorova model},
author = {Oleg M. Braun and Thierry~Dauxois and Maxim V. Paliy and Michel Peyrard},
journal= {arXiv preprint arXiv:patt-sol/9604003},
year = {2015}
}
Comments
27 Revtex pages, 9 figures to appear in Phys. Rev. B