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Scaling analysis of the magnetic-field-tuned quantum transition in superconducting amorphous In-O films

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

We have studied the magnetic-field-tuned superconductor-insulator quantum transition (SIT) in amorphous In-O films with different oxygen content and, hence, different electron density. While for states of the film near the zero-field SIT the two-dimensional scaling behaviour is confirmed, for deeper states in the superconducting phase the SIT scenario changes: in addition to the scaling function that describes the conductivity of fluctuation-induced Cooper pairs, there emerges a temperature-dependent contribution to the film resistance. This contribution can originate from the conductivity of normal electrons.

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V. F. Gantmakher, M. V. Golubkov, V. T. Dolgopolov, G. E. Tsydynzhapov, A. A. Shashkin. 2000-02-04. Scaling analysis of the magnetic-field-tuned quantum transition in superconducting amorphous In-O films. https://doi.org/10.1134/1.568304

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