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Nature of the superconductor–insulator transition in disordered superconductors

Author

Listed:
  • Yonatan Dubi

    (Ben Gurion University)

  • Yigal Meir

    (Ben Gurion University
    The Ilse Katz Center for Meso- and Nano-Scale Science and Technology, Ben Gurion University, Beer Sheva 84105, Israel)

  • Yshai Avishai

    (Ben Gurion University
    The Ilse Katz Center for Meso- and Nano-Scale Science and Technology, Ben Gurion University, Beer Sheva 84105, Israel)

Abstract

Island hopping As a superconducting thin film becomes disordered and subject to an increasing magnetic field, a point is reached when it undergoes a transition from a superconducting to an insulating state. Dubi et al. use numerical simulations to study this transition — or, as it turns out, two types of transition. The key effect of disorder is to create 'islands' of strong superconductivity, coupled by regions that are only weakly superconducting. In the case of weak disorder, an increasing magnetic field eventually destroys the superconducting state throughout the material, leading to an insulator. When disorder is strong, superconductivity persists in the islands, and the effect of a magnetic field is to suppress the coupling between them — again leading to an insulating state. These findings may be relevant to the high-temperature superconductors, where intrinsic disorder may play a role.

Suggested Citation

  • Yonatan Dubi & Yigal Meir & Yshai Avishai, 2007. "Nature of the superconductor–insulator transition in disordered superconductors," Nature, Nature, vol. 449(7164), pages 876-880, October.
    • Handle: RePEc:nat:nature:v:449:y:2007:i:7164:d:10.1038_nature06180
    DOI: 10.1038/nature06180
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