Magnetotransport in the doped Mott insulator

We investigate the Hall effect and the magnetoresistance of strongly correlated electron systems using the dynamical mean-field theory. We treat the low- and high-temperature limits analytically, and explore some aspects of the intermediate-temperature regime numerically. We observe that a bipartite-lattice condition is responsible for the high-temperature result sigma(xy) similar to 1/T-2 obtained by various authors, whereas the generic behavior is sigma(xy) similar to 1/T, as for the longitudinal conductivity. We find that Kohler's rule is obeyed neither at high nor at intermediate temperatures. [S0163-1829(99)06203-7].