Scale-invariant magnetic textures in the strongly correlated oxide NdNiO3

Jiarui Li, Jonathan Pelliciari, Claudio Mazzoli, Sara Catalano, Forrest Simmons, Jerzy T. Sadowski, Abraham Levitan, Marta Gibert, Erica Carlson, Jean-Marc Triscone, Stuart Wilkins and Riccardo Comin ()
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Jiarui Li: Massachusetts Institute of Technology
Jonathan Pelliciari: Massachusetts Institute of Technology
Claudio Mazzoli: Brookhaven National Laboratory
Sara Catalano: DQMP, University of Geneva, 24 quai Ernest-Ansermet, 1211 Genève 4
Forrest Simmons: Purdue University
Jerzy T. Sadowski: Brookhaven National Laboratory
Abraham Levitan: Massachusetts Institute of Technology
Marta Gibert: University of Zurich
Erica Carlson: Purdue University
Jean-Marc Triscone: DQMP, University of Geneva, 24 quai Ernest-Ansermet, 1211 Genève 4
Stuart Wilkins: Brookhaven National Laboratory
Riccardo Comin: Massachusetts Institute of Technology

Nature Communications, 2019, vol. 10, issue 1, 1-7

Abstract: Abstract Strongly correlated quantum solids are characterized by an inherently granular electronic fabric, with spatial patterns that can span multiple length scales in proximity to a critical point. Here, we use a resonant magnetic X-ray scattering nanoprobe with sub-100 nm spatial resolution to directly visualize the texture of antiferromagnetic domains in NdNiO3. Surprisingly, our measurements reveal a highly textured magnetic fabric, which we show to be robust and nonvolatile even after thermal erasure across its ordering temperature. The scale-free distribution of antiferromagnetic domains and its non-integral dimensionality point to a hitherto-unobserved magnetic fractal geometry in this system. These scale-invariant textures directly reflect the continuous nature of the magnetic transition and the proximity of this system to a critical point. The present study not only exposes the near-critical behavior in rare earth nickelates but also underscores the potential for X-ray scattering nanoprobes to image the multiscale signatures of criticality near a critical point.

Date: 2019
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DOI: 10.1038/s41467-019-12502-0

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