Normal-State Hall Effect and the Insulating Resistivity of High-T_c Cuprates at Low Temperatures
arXiv:cond-mat/9710155 · doi:10.1103/PhysRevB.56.R8530
Abstract
The normal-state Hall coefficient R_H and the in-plane resistivity Ï_{ab} are measured in La-doped Bi_{2}Sr_{2}CuO_{y} (T_c \simeq 13 K) single crystals and La_{2-x}Sr_{x}CuO_{4} thin films by suppressing superconductivity with 61-T pulsed magnetic fields. In contrast to data above T_c, the R_H below \sim 10 K shows little temperature dependence in all the samples measured, irrespective of whether Ï_{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.
4 pages, revtex, 2 figures