Conventional c-axis charge transport in the electron-doped cuprates

ORAL

Abstract

We have measured the interlayer (c-axis) magnetoresistivity of the electron-doped cuprate superconductor Nd$_{\mathrm{2-x}}$Ce$_{\mathrm{x}}$CuO$_{\mathrm{4+\delta}}$(NCCO) at and below optimal doping. In zero magnetic field, the low- and intermediate-temperature regimes are dominated by logarithmic and quadratic temperature dependences, respectively. The low-temperature logarithmic upturn indicates the onset of localization, whereas the quadratic dependence is attributed to Fermi-liquid behavior. Furthermore, the transverse c-axis magnetoresistivity exhibits H$^{\mathrm{2}}$ dependence, not only above the zero-field Tc, but also at lower temperature once a sufficiently large external field suppresses the superconductivity. These findings suggest that the out-of-plane conduction in the electron-doped cuprates is rather conventional.

*Work supported by NSF grant DMR-1006617 and by a seed grant through the NSF MRSEC program.

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Authors

  • Yangmu Li

    • School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455

  • N. Bari\v{s}i\'{c}

    • School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455

  • G. Yu

    • School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455

  • E.M. Motoyama

    • Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305

  • I.M. Vishik

    • Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305

  • S.T. Hannahs

    • National High Magnetic Field Laboratory, Tallahassee, FL, 32310

  • M. Greven

    • School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455