OBSERVATION OF THE QUASI-PARTICLE HALL-EFFECT IN SUPERCONDUCTING YBA2CU3O7-DELTA

Coherent time-domain spectroscopy was used to measure the complex tran smission tensor of several YBa2Cu3O7-delta thin films in magnetic fiel ds up to 6 T at temperatures from 10 to 200 K. The complex conductivit y tensor was determined from transmission measurements in the frequenc y range 150-800 GHz without the need for Kramers-Kronig analysis. Both the real and imaginary parts of sigma(xy) were found to peak near 40 K, exceeding their normal state values by more than a factor of 10. Th is behavior is ascribed to the Hall effect of quasiparticles in the su perconducting state.