Evidence of spatial inhomogeneity near the onset of magnetically induced insulating state in superconducting thin films
Carlos L. Vicente, Yongguang Qin, Jongsoo Yoon
DOI 10.1103/PhysRevB.74.100507 · Physical Review B
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Abstract
Nonmonotonic 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 insulatorlike while at high bias currents it is characteristic of metallic phase. The nonmonotonic 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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ta Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.2 | Pressure not reported | onset |
| Ta Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.7 | Pressure not reported | onset |
| MoGe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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