Nanostructure Investigations of Nonlinear Differential Conductance in NdNiO$_3$ Thin Films

ORAL

Abstract

Transport measurements on thin films of NdNiO$_3$ reveal a crossover to a regime of pronounced nonlinear conduction below the well-known metal-insulator transition temperature. The evolution of the transport properties at temperatures well below this transition appears consistent with a gradual formation of a gap in the hole-like Fermi surface of this strongly correlated system. As $T$ is decreased below the nominal transition temperature, transport becomes increasily non-Ohmic, with a model of Landau-Zener breakdown becoming most suited for describing $I(V)$ characteristics as the temperature approaches 2 K.

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Authors

  • Will Hardy

    • Department of Physics and Astronomy, Rice University

  • Heng Ji

    • Rice University
    • Department of Physics and Astronomy, Rice University

  • Evgeny Mikheev

    • Materials Department, University of California, Santa Barbara
    • UC Santa Barbara
    • Univ of California - Santa Barbara

  • Susanne Stemmer

    • University of California, Santa Barbara
    • Materials Department, University of California, Santa Barbara
    • UC Santa Barbara
    • Materials Dept., Univ. of California, Santa Barbara
    • University of California Santa Barbara
    • Univ of California - Santa Barbara

  • Douglas Natelson

    • Department of Physics and Astronomy, Rice University
    • Department of Physics \& Astronomy, Rice University