Interaction of moving discrete breathers with vacancies

PHYSICA D-NONLINEAR PHENOMENA

卷:216

Article; Proceedings Paper

Cuevas, J. ; Archilla, J. F. R. ; Sanchez-Rey, B. ; Romero, F. R.

关键词: discrete breathers;    mobile breathers;    intrinsic localized modes;    vacancies;    breather-kink interaction;   

DOI  :  10.1016/j.physd.2005.12.022

来源: Elsevier

【 摘 要 】

In this paper a Frenkel-Kontorova model with a nonlinear interaction potential is used to describe a vacancy defect in a crystal. According to recent numerical results [J. Cuevas, C. Katerji, J.FR. Archilla, J.C. Eilbeck, F.M. Russell, Influence of moving breathers on vacancies migration, Phys. Lett. A 315 (2003) 364-371] the vacancy can migrate when it interacts with a moving breather. We study more thoroughly the phenomenology caused by the interaction of moving breathers with a single vacancy and also with double vacancies. We show that vacancy mobility is strongly correlated with the existence and stability properties of stationary breathers; centered at the particles adjacent to the vacancy, which we will now call vacancy breathers. (c) 2006 Elsevier B.V. All rights reserved.

【 授权许可】

Free