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