Doping evolution of the electronic and magnetic structure in RENiO<sub>3</sub>

ORAL

Abstract

Rare earth nickelates (RENiO3) exhibit metal-insulator transitions accompanied by the appearance of charge and spin order, at times concurrently. The understanding of the evolving ground state in these materials is hindered by the existence of multiple competing orders which are further coupled to various kinds of local perturbations (strain, defects, disorder). Recently, control of carrier doping by means of oxygen stoichiometry has been achieved in RENiO3, presenting an opportunity to study the broader electronic phase diagram of these systems. In this talk, I will present our recent soft X-ray absorption spectroscopy and imaging, resonant X-ray scattering, and extended multiplet ligand field theory modeling results on both pristine and electron doped RENiO3. We identified the redistribution of the doped carriers in the correlated electronic ground state. Moreover, the magnetic order is robust to substantial levels of carrier doping until it collapses at a doping threshold. Our results reveal the doping dependent evolution of the electronic structure and magnetic phase diagram in RENiO3.

*This work was supported by the National Science Foundation under Grant No. 1751739 and the Air Force Office of Scientific Research Young Investigator Program under grant FA9550-19-1-0063.

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Presenters

  • Jiarui Li

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

Authors

  • Jiarui Li

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

  • Robert Green

    • Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 5E2

  • Zhen Zhang

    • School of Materials Engineering, Purdue University, West Lafayette, IN 47907
    • School of Materials Engineering, Purdue University

  • Ronny Sutarto

    • Canadian Light Source
    • Canadian Light Source, Saskatoon, SK S7N 2V3, Canada

  • Jerzy T. Sadowski

    • Center for Functional Nanomaterials, Brookhaven National Laboratory
    • Brookhaven National Laboratory
    • Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973
    • CFN, Brookhaven National Laboratory

  • Zhihai Zhu

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

  • Grace H. Zhang

    • Massachusetts Institute of Technology MIT
    • Harvard University

  • Da Zhou

    • Massachusetts Institute of Technology MIT

  • Yifei Sun

    • School of Materials Engineering, Purdue University, West Lafayette, IN 47907

  • Feizhou He

    • Canadian Light Source
    • Canadian Light Source, Saskatoon, SK S7N 2V3, Canada

  • Shriram Ramanathan

    • School of Materials Engineering, Purdue University, West Lafayette, IN 47907
    • School of Materials Engineering, Purdue University
    • Materials engineering, Purdue University

  • Riccardo Comin

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