In this paper, interstitial migration generated by scattering with a mobile breather is investigated numerically in a Frenkel-Kontorova one-dimensional lattice. Consistent with experimental results it is shown that interstitial diffusion is more likely and faster than vacancy diffusion. Our simulations support the hypothesis that a long-range energy transport mechanism involving moving nonlinear vibrational excitations may significantly enhance the mobility of point defects in a crystal lattice.
|Pages (from-to)||1057 - 1067|
|Number of pages||11|
|Journal||Discrete and Continuous Dynamical Systems - Series S|
|Publication status||Published - Dec 2010|