Far IR Hall Angle Measurements on Single Crystal Bi$_2$Sr$_2$CaCu$_2$0$_{8+x}$.

ORAL

Abstract

The far-infrared complex Hall angle was studied in thin optimally doped single crystal Bi$_2$Sr$_2$CaCu$_2$0$_{8+x}$ as a continuous function of temperature from 25 to 300 K and at a discrete set of frequencies in the range of 25 cm$^{-1}$ to 175 cm $^{-1}$ using a heterodyne technique. The real part of the inverse Hall angle obeys a temperature power law, T$^{n}$, where n = 1.65 which is consistent with the dc-value. For the three frequencies below 90 cm$^{-1}$, the Hall frequency is a constant in temperature and frequency to within 20\% from T$_C$ up to room temperature. The Hall mass of 2.5 m$_e$ in reasonable agreement with the values found in far IR optical measurements 3.0 m$_e$, ARPES dispersion results along the $(\pi,\pi)$ nodal direction (2.9 m$_e$), and mid IR Hall measurements (2.8 m$_e$) where m$_e$ is the bare electron mass. These results will be compared with theoretical predictions.

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Authors

  • Gregory Jenkins

  • Don Schmadel

    Department of Physics, University of Maryland, College Park, Maryland 20742, USA, Department of Physics, University of Maryland, College Park, Maryland 20742 USA

  • H.D. Drew

    Physics Dept., Univ. of Maryland, College Park, MD, Department of Physics, University of Maryland, College Park, Maryland 20742, USA, Physics Department, University of Maryland, College Park, MD 20742, University of Maryland, College Park, MD 20742, Department of Physics, University of Maryland, College Park, Maryland 20742 USA, University of Maryland

  • Gen D. Gu

    Department of Physics, Brookhaven National Laboratory, Upton, NY 11973, Department of Physics, Brookhaven National Laboratory, Upton, New York 11973 USA, Brookhaven National Laboratory