1999/08/02 by J. Cerne, J. Černe, M. Grayson +10 · 5 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.84.3418
8 pages, 3 figures
arxiv created 1999/08/02 · openalex publication_date 2000/04/10 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Infrared ( 20--120 and 900--1100cm^\ensuremath-1) Faraday rotation and circular dichroism are measured in high- Tc superconductors using sensitive polarization modulation techniques. Optimally doped YBa2Cu3O7 thin films are studied at temperatures in the range ( 15<T<300\phantom\rule0ex0exK) and magnetic fields up to 8 T. At 1000cm^\ensuremath-1 the Hall conductivity \ensuremathσxy varies strongly with temperature in contrast to the longitudinal conductivity \ensuremathσxx which is nearly independent of temperature. The Hall scattering rate \ensuremathγH has a T2 temperature dependence but, unlike a Fermi liquid, depends only weakly on frequency. The experiment puts severe constraints on theories of transport in the normal state of high- Tc superconductors.