Title: Interaction of moving breathers with vacancies
Speaker: C Katerji
(pdf talk slides 400 Kb, pdf poster 600 Kb)
With J Cuevas, JFR Archilla, F Palmero and JC Eilbeck
A vacancy defect is described by a Frenkel--Kontorova model with a discommensuration. We study the mechanism that can put into movement vacancies through the interaction of moving localized excitations (moving discrete breathers). We establish that the width of the interaction potential must be larger than a threshold value in order that the vacancy can move forward and that, for a certain range of parameters, there exists a threshold value of the translational energy of the moving breather. The occurrence of these phenomena are related to the properties of linear and nonlinear modes centred at the particles adjacent to the vacancy
NATO-LOCNET Advanced Research Workshop: Intrinsic Localized Modes and Discrete Breathers in Nonlinear Lattices.
Erice, Sicily, Italy, 21-27 July 2003. Poster and short talk by C Katerji.