In the bcc W, the simulation of oscillations was carried out according to the patterns of nonlinear delocalized vibrational modes - exact solutions of the equations of motion of atoms, the geometry of which is determined by the symmetry of the lattice. Two-dimensional cases of vibrations in one of the close-packed planes and three-dimensional cases, where the motions of atoms have three components in space, were considered. The amplitude-frequency characteristics (AFC) of these modes were calculated for several interatomic potentials available in the LAMMPS library.
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