Applied Physics Letters · 1990 · 21 citations · 4 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsElectronic MaterialsSolid State PhysicsCarrier TransportCurie TemperaturePhase TransitionsStrongly Correlated Electron SystemsSuperconducting MaterialsCarrier ConcentrationCarrier Concentration OptimizationCritical TemperatureCuprate SuperconductorsSuperconducting CeramicsSuperconducting Critical TemperatureUnconventional Superconductivity
The superconducting transition temperatures in Bi2Ca1−xLnxSr2Cu2O8+δ, TlCa1−xLnxSr2Cu2O6+δ, and Tl0.8Ca1−xLnxBa2Cu23O6+δ (Ln=Y or rare earth) vary with composition and show a maximum at a specific value of x or δ. This observation suggests that an optimal carrier concentration is required to attain maximum Tc in such cuprates which seem to be two-band systems.
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