High-field study of normal-state magnetotransport inTl2Ba2CuO6+δ

We present a study of in-plane normal-state magnetotransport in single-crystal ${\mathrm{Tl}}_2{\mathrm{Ba}}_2{\mathrm{CuO}}_{6+\mathrm{\delta }}$ in 60-T pulsed magnetic fields. In optimally doped samples ${(T}_c\sim 80$ K) the weak-magnetic-field regime extends to fields as high as 60 T, but in overdoped samples ${(T}_c\sim 30$ K) we are able to leave the weak-field regime, as shown by the behavior of both the magnetoresistance and the Hall resistance. Data from samples of both dopings provide constraints on the class of model necessary to describe normal-state transport in the cuprates.