Solitonic-exchange mechanism of surface~diffusion
patt-sol
2019-08-17 v1 mtrl-th
Pattern Formation and Solitons
Abstract
We study surface diffusion in the framework of a generalized Frenkel-Kontorova model with a nonconvex transverse degree of freedom. The model describes a lattice of atoms with a given concentration interacting by Morse-type forces, the lattice being subjected to a two-dimensional substrate potential which is periodic in one direction and nonconvex (Morse) in the transverse direction. The results are used to describe the complicated exchange-mediated diffusion mechanism recently observed in MD simulations [J.E. Black and Zeng-Ju Tian, Phys. Rev. Lett. {\bf 71}, 2445-2448(1993)].
Cite
@article{arxiv.patt-sol/9604002,
title = {Solitonic-exchange mechanism of surface~diffusion},
author = {Oleg M. Braun and Thierry Dauxois and Michel Peyrard},
journal= {arXiv preprint arXiv:patt-sol/9604002},
year = {2019}
}
Comments
22 Revtex pages, 9 figures to appear in Phys. Rev. B