Normal-State Hall Effect and the Insulating Resistivity of High-Tc Cuprates at Low Temperatures
Abstract
The normal-state Hall coefficient RH and the in-plane resistivity ab are measured in La-doped Bi2Sr2CuOy (Tc 13 K) single crystals and La2-xSrxCuO4 thin films by suppressing superconductivity with 61-T pulsed magnetic fields. In contrast to data above Tc, the RH below 10 K shows little temperature dependence in all the samples measured, irrespective of whether ab exhibits insulating or metallic behavior. Thus, whatever physical mechanism gives rise to insulating behavior in the low-temperature normal state, it leaves the Hall conductivity relatively unchanged.
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