QUASI-PARTICLE HALL-EFFECT IN SUPERCONDUCTING YBA2CU3O7-DELTA

Coherent time-domain spectroscopy was used to measure the complex tran smission tenser of three YBa2Cu3O7-delta thin films in magnetic fields up to 6 T at temperatures from 10 to 200 K. The complex conductivity tenser was determined from transmission measurements in the frequency range 100-800 GHz without the need for Kramers-Kronig analysis. Both t he 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 ten. Th is behavior rs ascribed to the Hall effect of quasiparticles in the su perconducting state.