Infrared Hall Effect in the electron-doped high $T_c$ cuprate Pr$_{2-x}$Ce$_{x}$CuO$_4$

ORAL

Abstract

We have performed infrared Hall measurements ($\sigma_{xy}$) as a function of temperature, frequency (950-1100~cm$^{-1}$) and wide doping range of Pr$_{2-x}$Ce$_{x}$CuO$_4$. Previous measurements have shown that electron-doped materials present clear evidence for a gap in the $\sigma_{xx}$ spectrum [1] and the DC Hall effect [2] for samples below both a critical doping of $x_c\sim$ 0.17, a characteristic temperature $T_W$ and an energy $\omega_W$. Our results lend further support to a density wave state in underdoped PCCO. However, these results demonstrate that $\sigma_{xy}$ exhibits strong deviations from the extended Drude model in contrast to its success for $\sigma_ {xx}$ in overdoped Pr$_{2-x}$Ce$_{x}$CuO$_4$ and in hole-doped cuprates. The work at University of Maryland was supported by NSF grants DMR-0352735 and DMR-0303112. [1] A. Zimmers $et$ $al$., Europhys. Lett., \textbf{70} (2), 225 (2005). [2] Y. Dagan $et$ $al$., Phy. Rev. Lett. \textbf{92}, 167001 (2004).

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Authors

  • W. M. Fisher

  • A. Zimmers

    Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, Maryland 20742, USA

  • Lingyun Shi

  • Don Schmadel

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

  • Richard Greene

    Center for Superconductivity Research, University of Maryland, College Park, Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, Maryland 20742, USA., Center for Superconductivity Research and Department of Physics, University of Maryland, College Park, MD, 20742, Center for Superconductivity Research, University of Maryland, College Park, MD

  • 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