Normal-State Hall Effect and the Insulating Resistivity of High-Tc Cuprates at Low Temperatures
Yoichi Ando, G. S. Boebinger, A. Passner, N. L. Wang, C. Geibel, F. Steglich, I. E. Trofimov, F. F. Balakirev
Abstract
The normal-state Hall coefficient RH and the in-plane resistivity ρab 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 ρab 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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