Influence of moving breathers on vacancies migration
J. Cuevas, C. Katerji, J. F. R. Archilla, J. C. Eilbeck, F. M. Russell
Abstract
A vacancy defect is described by a Frenkel--Kontorova model with a discommensuration. This vacancy can migrate when interacts with a moving breather. We establish that the width of the interaction potential must be larger than a threshold value in order that the vacancy can move forward. This value is related to the existence of a breather centred at the particles adjacent to the vacancy.
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