Superconducting film with randomly magnetized dots: A realization of the two-dimensional XY model with random phase shifts

Article

关键词: KOSTERLITZ-THOULESS TRANSITION;    JOSEPHSON-JUNCTION ARRAYS;    DISORDER;    GLASS;    SYSTEMS;    FIELD;   

DOI  :  10.1103/PhysRevB.80.174528

来源: SCIE

【 摘 要 】

We consider a thin superconducting film with randomly magnetized dots on top of it. The dots produce a disordered pinning potential for vortices in the film. We show that for dots with permanent and random magnetization normal or parallel to the film surface, our system is an experimental realization of the two-dimensional XY model with random phase shifts. The low-temperature superconducting phase, that exists without magnetic dots, survives in the presence of magnetic dots for sufficiently small disorder.

【 授权许可】

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