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

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

2000-02-04

arxiv.org/abs/cond-mat/0002065v1

Physics

Condensed Matter

Superconductivity

4 pages, 5 figures; accepted for publication in JETP Lett. 71 (4), 2000

Scientific paper

10.1134/1.568304

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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