Abstract
Molecular dynamics computer simulations were carried out for three-dimensional anharmonic mass-spring model crystals. Between the nearest and next nearest neighbor atoms central forces were considered, and anharmonic potential up to the fourth order was taken into account. An input pulse displacement was given to atomic rows on a free surface of the crystal, and the induced displacements on the surface and in the bulk of the crystal were computed. Solitons were produced as atomic excitations when only the nearest neighbor atomic interactions were considered. Simulations were carried out under various computational conditions to determine the characteristics of soliton production.
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