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