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

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Abstract

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.

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Pis’ma Zh. Éksp. Teor. Fiz. 68, No. 4, 337–342 (25 August 1998)

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Gantmakher, V.F., Golubkov, M.V., Dolgopolov, V.T. et al. Destruction of localized electron pairs above the magnetic-field-driven superconductor-insulator transition in amorphous In-O films. Jetp Lett. 68, 363–369 (1998). https://doi.org/10.1134/1.567874

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  • DOI: https://doi.org/10.1134/1.567874

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