Kink nucleation in two-dimensional Frenkel-Kontorova model
Materials Science
2009-11-07 v1
Abstract
A computer simulation of thermofluctuation nucleation of kinks on dislocations and their dynamics is carried out in the framework of two-dimensional (2D) Frenkel-Kontorova model. It is shown that at relatively low temperatures and applied stresses the kinks can appear as a result of developing instability of phonon modes localized in the vicinity of the dislocation. The transition from this mechanism to the ordinary thermofluctuation kink nucleation with temperature increase can reveal itself in the peculiarities of yield stress temperature dependence.
Keywords
Cite
@article{arxiv.cond-mat/0206428,
title = {Kink nucleation in two-dimensional Frenkel-Kontorova model},
author = {Yu. N. Gornostyrev and M. I. Katsnelson and A. V. Kravtsov and A. V. Trefilov},
journal= {arXiv preprint arXiv:cond-mat/0206428},
year = {2009}
}
Comments
REVTeX 4 style, 4 pages, 4 figures, to appear in Phys. Rev. E, August 1, 2002