Destruction of localized electron pairs above the magnetic-field-driven superconductor-insulator transition in amorphous In-O films

  • V. F. Gantmakher
  • M. V. Golubkov
  • V. T. Dolgopolov
  • G. E. Tsydynzhapov
  • A. A. Shashkin


The field-induced superconductivity-destroying quantum transition in amorphous indium oxide films are investigated at low temperatures down to 30 mK. It is found that, on the high-field side of the transition, the magnetoresistance reaches a maximum and the phase can be insulating as well as metallic. With further increase of the magnetic field the resistance of the film drops and in the high-field limit approaches the resistance value at the transition point, so that at high fields the metallic phase occurs for both cases. We give a qualitative account of this behavior in terms of field-induced destruction of localized electron pairs.

PACS numbers

74.25.Jb 74.76.Db 74.70.Ad 


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Copyright information

© MAIK "Nauka/Interperiodica" 1998

Authors and Affiliations

  • V. F. Gantmakher
    • 1
  • M. V. Golubkov
    • 1
  • V. T. Dolgopolov
    • 1
  • G. E. Tsydynzhapov
    • 1
  • A. A. Shashkin
    • 1
  1. 1.Institute of Solid State PhysicsRussian Academy of SciencesChernogolovka, Moscow RegionRussia

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