Evidence of spatial inhomogeneity near the onset of magnetically induced insulating state in superconducting thin films
arXiv:cond-mat/0609107 · doi:10.1103/PhysRevB.74.100507
Abstract
Non-monotonic differential resistance (dV/dI) is observed in magnetically induced insulating films which exhibit apparent superconductor-metal-insulator transitions in the low temperature limit; at low bias currents the nonlinear transport is insulator-like while at high bias currents it is characteristic of metallic phase. The non-monotonic dV/dI may be evidence that the insulating state consists of metallic domains connected by point contacts (insulating gaps), implying that spatial inhomogeneities play a dominant role in determining the nature of the apparent metal-insulator transition.
arXiv comment4 pages, 3 figures
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Cited by in corpus (4)
- Highly crystalline 2D superconductors
- Electric breakdown effect in the current-voltage characteristics of amorphous indium oxide thin films near the superconductor-insulator transition
- Signature of Cooper Pairs in the Non-Superconducting Phases of Amorphous Superconducting Tantalum Films
- Deficiency of the scaling collapse as an indicator of a superconductor-insulator quantum phase transition