Crowdions being interstitial atoms located in close-packed atomic rows, play an important role in relaxation processes that occur in metals and alloys under severe external influences, effectively transferring mass and energy. Recently the concept of a supersonic crowdion was expanded to an N-crowdion consisting in one dimensional motion of N extra atoms along a closely packed atomic row. In this study, the molecular dynamics method was used to study the motion of 1- and 2-crowdions in the fcc Pt lattice. The N-crowdion was excited by applying similar velocity to N neighboring atoms along a closely packed row. It was established that independently of the initial conditions, the crowdion exhibits quasiperiodic breather dynamics, while the average path length is practically independent of the initial velocity and configuration.
Crowdion is a variation of an interstitial defect located in closely packed atomic rows, can play an important role in relaxation processes occurring in crystals in nonequilibrium conditions effectively transferring mass and energy. Recently dynamics of crowdions has been extensively studied for different types of lattices and dimensions. However, the point of energy exchange between crowdions has not been considered earlier. The paper presents an analysis of energy exchange in a complex of crowdions located in neighboring closely packed atomic row. Obtained results reveal that closely located crowdions can intensively transfer energy from one to another thus affecting the dynamics and scenario of defect structure evolution in the crystal.
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