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.

*Work at BNL (Colorado) supported by Office of Basic Energy Sciences, US DOE, under Contract No. DE-SC0012704 (DE-SC0006939).

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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