The ac Hall effect in high- superconductors

Abstract
Far-infrared magnetotransmission measurements of normal-state thin films are discussed. The magneto-optical signals observed in circularly polarized light are consistent with the ac Hall effect of holes with a reduced scattering rate and an enhanced mass compared to the zero-field transport parameters. The results agree with a simple high-frequency extension of models which have been developed to explain the anomalous dc Hall effect in the normal state of high- superconductors in terms of two scattering rates. The Hall scattering rate , where and K. These experiments provide new tests of the Fermi-liquid versus non-Fermi-liquid nature of these materials.