Negative magnetoresistance, negative electroresistance, and metallic behavior on the insulating side of the two-dimensional superconductor-insulator transition in granular Pb films
R. P. Barber, Jr., Shih-Ying Hsu, J. M. Valles, Jr., R. C. Dynes, R. E. Glover, III
DOI 10.1103/PhysRevB.73.134516 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Granular Pb thin films on the insulating side of the two-dimensional superconductor-insulator transition are observed to exhibit a large negative magnetoresistance and electroresistance (change in resistance with electric field) at low temperatures. At high measurement voltages and low temperatures, the film resistances become temperature independent creating a “metallic” state. These phenomena are explained as manifestations of transport due to intergranular quasiparticle tunneling. This explanation might also provide insights into the similar behavior observed in other superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.2 | Pressure not reported | unknown |
Similar papers
Negative Magnetoresistance in Homogeneous Amorphous Superconducting Pb Wires
similarity 0.95P. Xiong et al.
Source status unknown — claims are unverified
Nanoengineered Magnetic-Field-Induced Superconductivity
similarity 0.95Martin Lange et al.
Source status unknown — claims are unverified
Magnetic-Field-Induced Superconductivity in Ultrathin Pb Films with Magnetic Impurities
similarity 0.95Masato Niwata et al.
Source status unknown — claims are unverified
Superconducting and spin-dependent tunneling using native oxide barriers on CoFe thin films
similarity 0.95C. L. Platt et al.
Source status unknown — claims are unverified
Superconducting fluctuations and paraconductivity in ultrathin amorphous Pb films near superconductor-insulator transitions
similarity 0.94Haoyang Liu et al.
Source status unknown — claims are unverified
Using spin-polarized neutron reflectivity to probe mesoscopic vortex states in a Pb thin-film superconductor
similarity 0.94A. J. Drew et al.
Source status unknown — claims are unverified