Mater.Phys.Mech.(MPM)
No 1, Vol. 40, 2018, pages 104-111

STATISTICAL CHARACTERISTICS OF A QUASI-BREATHER WITH A HARD
TYPE OF NONLINEARITY IN A CuAu CRYSTAL

á.í. Eremin, P.V. Zakharov, M.D. Starostenkov

Abstract

By the method of molecular dynamics a study in the work is made of the statistical characteristics of a quasi-breather in a model CuAu crystal. The phonon spectrum of this model crystal, the dependences of mean-square deviation, the coefficient of variation and the average frequency of the model quasi-breather on the time of its existence are obtained. The statistical data analysis allows for the conclusion that the quasi-breather model solution in the model considered (which uses the interatomic potential obtained by means of embedded atom method (EAM)) slightly differs from the one in the corresponding exact breather.

Keywords: quasi-breather, discrete breather, nonlinear dynamics, soliton

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