Fluctuation-induced reconstruction of defect structure

A synergetic conception of plastic deformation where the cooperation between defects results to a phase transition is presented. A reconstruction picture of defect structure in the presence of fluctuations in extended systems is considered. We show that the system undergoes a reentrant phase transitions of first and second order with an increase in an intensity of fluctuations, diffusion constant or external tension due to existence of correlation effects of fluctuations.