Computer experiment on surface waves in non-linear crystals

Molecular dynamics computer simulation was carried out for three-dimensiona l harmonic and anharmonic mass-spring model crystals. A longitudinal input pulse displacement was given on a free surface of the crystal, and the long itudinal and transverse displacements induced on the surface and in the bul k of the crystal were computed. Surface phonons and surface solitons were s uccessfully produced in the cases of harmonic and anharmonic crystals, resp ectively, when only the nearest neighbor interactions were considered betwe en atoms. (C) 1999 Elsevier Science B.V. All rights reserved.