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

Zoran Ristivojevic
Phys. Rev. B 80, 174528 – Published 30 November 2009

Abstract

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.

  • Figure
  • Received 31 March 2009

DOI:https://doi.org/10.1103/PhysRevB.80.174528

©2009 American Physical Society

Authors & Affiliations

Zoran Ristivojevic

  • Institut für Theoretische Physik, Universität zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany
  • Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA

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Issue

Vol. 80, Iss. 17 — 1 November 2009

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