Abstract
The interaction of discrete breathers (DBs) propagating along a close-packed atomic row with a vacancy situated in the same row has been studied by molecular dynamics in a two-dimensional monoatomic crystal with the Morse interatomic potential. It is established that DBs moving at a velocity below a certain threshold exhibit elastic repulsion from the vacancy, while DBs with velocities above this threshold are scattered on the vacancy. The interaction of DBs with a vacancy decreases the energy barrier for vacancy migration in the crystal.
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Original Russian Text © A.A. Kistanov, S.V. Dmitriev, A.S. Semenov, V.I. Dubinko, D.A. Terent’ev, 2014, published in Pis’ma v Zhurnal Tekhnicheskoi Fiziki, 2014, Vol. 40, No. 15, pp. 58–65.
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Kistanov, A.A., Dmitriev, S.V., Semenov, A.S. et al. Interaction of propagating discrete breathers with a vacancy in a two-dimensional crystal. Tech. Phys. Lett. 40, 657–661 (2014). https://doi.org/10.1134/S1063785014080069
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DOI: https://doi.org/10.1134/S1063785014080069