Insulator-Superconductor Transition in 3D Granular Al-Ge Films
- 2 June 1997
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 78 (22), 4277-4280
- https://doi.org/10.1103/physrevlett.78.4277
Abstract
We report the results of high magnetic field study of granular 3D Al-Ge and demonstrate that intragranular superconductivity leads in truly insulating samples (with an exponentially diverging normal state resistivity), either to a global superconducting phase coherent state, or to a “superconductor-insulator” state with Cooper pairs totally localized within individual grains, depending on the strength of the intergranular Josephson coupling.Keywords
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