THE DYNAMIC CROWDIONS AND POINT-DEFECT FORMATION IN HIGH-TEMPERATURE SUPERCONDUCTORS

The running of CuO collision chains in the (001) direction is investigated in YBa2Cu3O7 by the molecular dynamics method. The pair potential which contained the members responsible for Coulomb and repulsive interaction was used for the description of the interactions between the ions. Appreciable fluctuations of oxygen ions reminding of thermal ones were observed. An energy transmission process through a chain quickly subsided. The origination of the colision chain may be observed in the direction opposite to the initial direction of the motion of the primary knock atom (an oxygen ion). The threshold energy values Ed were found for a given chain with different initial direction of motion and types of primary knock atom. The atomic configurations of the interstitial copper and copper vacancy were determined as well as VO + VCu, IO + ICu. © 1990.