Thermodynamics of vortices system in thin superconducting film with radiation defects

Paper studies the effect of radiation defects on the thermodynamics of the Pearl vortices system within the thin superconducting film. Pattern of the Kosterlitz-Thouless transition within such a system is shown to depend on nd defect concentration. In case of low concentration the transition is characterized by continuity, while in case of high concentration one may observe the temperature range covering two metastable states. Temperature dependences of concentrations of defect free and captured vortices are calculated under various values of nd defect concentration. Phase diagram of the system of vortices within nd - T plane is plotted