Journal
PHYSICS LETTERS A
Volume 315, Issue 5, Pages 364-371Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0375-9601(03)01097-1
Keywords
discrete breathers; mobile breathers; intrinsic localized modes; defects
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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 for-ward. This value is related to the existence of a breather centred at the particles adjacent to the vacancy. (C) 2003 Elsevier B.V. All rights reserved.
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