Mobility of soliton-like waves in CuAu crystal

Molecular dynamics is used in this work to study the energy transport through the CuAu crystal lattice by discrete breathers (DBs) with frequencies above the phonon spectrum. The DB moves along the close packed atomic row in the Cu sublattice. An asymmetry was introduced in the initial conditions used for DB excitation in order to set the DB in motion. The maximal distance travelled by the DB was calculated as the function of the asymmetry parameter. The results indicate a weak mobility of such objects in the considered CuAu crystal. Nevertheless, energy transport along the close-packed directions of the Cu sublattice is possible.