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Impact of low-temperature stripe freezing in La<sub>1.67</sub>Sr<sub>0.33</sub>NiO<sub>4</sub>

ORAL

Abstract

La1.67Sr0.33NiO4 develops charge stripe order below 240 K and spin stripe order below 190 K. We have reconsidered a wide variety of experimental studies that indicate changes in the stripe correlations below ~ 50 K [1]. From new neutron diffraction measurements of a significant set of stripe-order peaks, we make the case that the charge stripes, which can be centered on either Ni or O sites, become predominantly Ni-centered at low temperature. This is a prerequisite for the one-dimensional spin fluctuations on charge stripes that are observed at low temperature.
[1] A. M. Merritt et al., arXiv:1909.07411.

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Presenters

  • John Tranquada

    Brookhaven national lab, Brookhaven National Laboratory, Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory

Authors

  • John Tranquada

    Brookhaven national lab, Brookhaven National Laboratory, Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory

  • Adrian Merritt

    University of Colorado at Boulder

  • Dmitry Reznik

    University of Colorado, Boulder, University of Colorado at Boulder, Physics, University of Colorado, Boulder

  • Vasile O Garlea

    Oak Ridge National Laboratory, Quantum Condensed Matter Div, Oak Ridge National Lab, Oak Ridge National Lab, Oak Ridge National Lab, Neutron Scattering Division

  • Genda Gu

    Brookhaven National Laboratory, Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory, Brookhaven national lab, Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Brookhaven National Lab, Condensed Matter Physics and Material Science, Brookhaven National Laboratory, Upton, NY, United States, Brookhaven National Laboratories, Condensed Matter Physics and Material Science Division, Brookhaven National Laboratory