Computer Simulation of Self-Organization Processes Leading

Abstract – The present paper is aimed at studying nonlinear effects in solids induced by the interac-tion of low-energy ions with the surface of crystal lattices as well as self-organization processes that cause nanostructural evolution in nonlinear crystal media. The computer simulation was used to inves-tigate the interaction between low-energy ions and nonlinear crystal lattices. Energy transmitted to target atoms was less than the threshold needed to form point defects but sufficient for nonlinear os-cillation excitation in ion subsystem of a lattice. A molecular dynamics method was applied for cal-culating the evolution of atom ensembles in lattices of different dimensions using the equations of clas-sical dynamics. We have showed that nonlinear oscillations become excited in the atomic chains of crystal lattices after low-energy ions irradiation and as a result of them the whole atoms become stabilized in new positions, which results in the formation and development of new metastable but long-lived atomic groups (nanoclusters). 1