Abstract
By method of molecular dynamics discrete breathers with soft and hard types of non-linearity in the Pt3Al crystal are studied. Obtained graphs characterize the spatial localization of the discrete breathers, the dependence of the frequency on the oscillation amplitude and the amount of energy localized on the discrete breathers. It is shown that the collision of moving discrete breathers may lead to the energy exchange between the breathers with some portion of the energy given to the Pt3Al lattice. The probability of excitation of discrete breathers in thermodynamic equilibrium is estimated.
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