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