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Evidence for a quantum phase transition in the electron-doped cuprate Pr2-xCexCuO4+d from Hall and resistivity measurements
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2003
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Superconducting MaterialEngineeringAb-plane ResistivityElectron-doped Cuprate Pr2-xcexcuo4+dSuperconductivityQuantum MaterialsHigh Tc SuperconductorsResistivity MeasurementsLow-temperature SuperconductivityMaterials ScienceQuantum ScienceHigh-tc SuperconductivityPhysicsCritical DopingSemiconductor MaterialSolid-state PhysicQuantum Phase TransitionOriented FilmsHigh-temperature SuperconductivityApplied PhysicsCondensed Matter PhysicsDisordered Quantum System
The doping and temperature dependence of the Hall coefficient, RH, and ab-plane resistivity in the normal state down to 350mK is reported for oriented films of the electron-doped high-Tc superconductor Pr2-xCexCuO4+d. The doping dependence of b (r=r0+AT^b) and R_sub_H (at 350 mK) suggest a quantum phase transition at a critical doping near x=0.165.