Physical Review Letters · 2001 · 54 citations · 26 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsMaterials PhysicsSolid State PhysicsDisordered SystemsElectrical ConductivityMetalsPhase TransitionsSuperconducting MaterialsSuperconducting Thin FilmsDisorder Effects In TransportDisordered SuperconductivityElectronic Transport In Disordered SystemsInsulator-to-metal TransitionMetal-insulator TransitionPhase Diagram ConstructionSuperconducting PropertiesTransport In Solids
We have studied the transport properties of disordered WSi films near the metal/insulator transition (MIT) and we have also reviewed the data for several other disordered materials near their MIT. In all cases, we found the presence of enhanced superconductivity. We constructed a superconductivity "phase diagram" (i.e., T(c) versus sigma) for each system, which reveals a striking correlation: In all cases, T(c) values are significantly enhanced only for samples whose conductivities lie within a narrow range on the metallic side of, and moderately near, the MIT. We present a heuristic model to explain this phenomenon.
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Superconductivity of metals and alloys
Lakshmiprasanna H.R. · Nuclear Physics A · 1967 · 4K citations