HALL-COEFFICIENT OF THE DOPED MOTT INSULATOR - A SIGNATURE OF PARITY VIOLATION

We show that the Hall coefficient R(H) of a doped two-dimensional Mott insulator is temperature dependent in the state where long-range magnetic order vanishes. The Hall number n(H) = R(H)-1 is linear in the doping density at high temperatures and decreases monotonically with decreasing temperature. At low temperatures R(H) diverges, indicating the possible onset of a phase with spontaneous chirality.