- Rapid Communication
Magnetoresistance in a strongly interacting two-dimensional metal
Phys. Rev. B 46, 591(R) – Published 1 July, 1992
DOI: https://doi.org/10.1103/PhysRevB.46.591
Abstract
Using a gauge-theory formulation of the fluxless metallic phase of the t-J model in two dimensions, it is shown that the soft chiral spin fluctuations existing in this phase are suppressed by the introduction of a small transverse magnetic field, while soft charge fluctuations are enhanced. This effect results in the reduction of the predicted linear-in-temperature resistance by an amount proportional to the square of the Hall conductance in the strong-correlation limit near half filling. However, away from this limit, the magnetoresistance may be positive. A similar effect is also shown to exist for the thermal resistance and the specific heat. A comparison with available data on the oxide superconductors is made.