Regular Article - Computational Methods
Evolution of supersonic 2-crowdion clusters in a 3D Morse lattice
Department of Physics, Saratov State University, Saratov, Russia
2 Ufa State Petroleum Technological University, Kosmonavtov Str., 1, 450062, Ufa, Republic of Bashkortostan, Russia
Accepted: 22 February 2021
Published online: 24 March 2021
The rapid development of new technologies is often associated with the realization of nonequilibrium states in materials, in which new mechanisms of structure evolution, different from the traditional ones, can arise. One example is the formation of crowdions, that is, interstitial atoms located in close-packed atomic rows. Crowdions can move at subsonic or supersonic speeds. It has previously been demonstrated that supersonic crowdion clusters are much more efficient at transferring mass than classic supersonic crowdions. This work presents an analysis of the propagation of supersonic crowdion clusters in parallel close-packed atomic rows in an fcc Morse crystal. Supersonic 2-crowdions are excited in four close-packed atomic rows, between which there is one close-packed row, which is not initially excited. The counterintuitive formation of a vacancy in the inner atomic row was observed rather far from the point of excitation. The distance between the vacancy in the inner row and the initiation point depends on the initiation energy. The mechanism of vacancy formation is described. The results obtained can be useful for analyzing the rearrangement and accumulation of defects in materials under extreme conditions.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2021