First Reconstruction of the Antiferromagnetic Order Parameter in NdNiO3 from Resonant Soft X-ray Bragg Ptychography.

ORAL

Abstract

Cubic perovskite nickelates with a rare earth ion (ANiO3) exhibit both a metal to insulator transition and a transition to antiferromagnetic order, which coincide in the case of NdNiO3. The many-body nature of these oxides and the interplay between antiferromagnetic order and charge disproportionation leads to a complex landscape involving significant inhomogeneity at the nanoscale. This is exhibited in the form of phase segregation near both the antiferromagnetic and metal to insulator transitions [1]. We report on a first step towards fully characterizing that nanoscale texture using resonant soft x-ray coherent Bragg ptychography at the CSX beamline of NSLS-II. In addition, our work demonstrates for the first time the feasibility of Bragg ptychography in the soft x-ray regime using the weak resonant scattering signals associated with electronic ordering wavevectors.

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Presenters

  • Abraham Levitan

    • Department of Physics, Massachusetts Institute of Technology
    • Massachusetts Institute of Technology

Authors

  • Abraham Levitan

    • Department of Physics, Massachusetts Institute of Technology
    • Massachusetts Institute of Technology

  • Jiarui Li

    • Massachusetts Institute of Technology
    • Department of Physics, Massachusetts Institute of Technology

  • Kevin Mertes

    • Los Alamos National Laboratory

  • Marc Allain

    • Institut Fresnel

  • Ash Tripathi

    • Los Alamos National Laboratory

  • Wen Hu

    • NSLS-II, Brookhaven National Laboratory
    • Brookhaven National Laboratory

  • Richard L Sandberg

    • Center for Integrated Nanotechnologies, Los Alamos National Laboratory
    • Los Alamos National Laboratory

  • Claudio Mazzoli

    • Brookhaven National Laboratory
    • NSLS-II, Brookhaven National Laboratory
    • National Synchrotron Light Source II, Brookhaven National Laboratory
    • BNL
    • Brookhaven National Lab

  • Riccardo Comin

    • Massachusetts Institute of Technology
    • Massachusetts Institute of Technology, Department of Physics
    • Department of Physics, Massachusetts Institute of Technology
    • Stuart Blussom Quantum Matter Institute, University of British Columbia