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High magnetic field ultrasound study of spin freezing in La<sub>1.88</sub>Sr<sub>0.12</sub>CuO<sub>4</sub>

ORAL

Abstract

In the high-Tc cuprate La2−xSrxCuO4 (LSCO), sound velocity and attenuation measurements have recently been shown to be sensitive to the antiferromagnetic (AFM) glass phase [1], a glass-like spin freezing with antiferromagnetic correlations. Here we focus on the case of La1.88Sr0.12CuO4 [2] where this magnetic phase is the most prominent [3]. Our ultrasound data reveal classical signatures of spin freezing that are reinforced up to unexpectedly high magnetic fields. This indicates very strong competition between superconductivity and magnetic freezing, tuned by the magnetic field. Comparison between different acoustic modes points toward a bilinear coupling of B1g strain with the spin fluctuations, which suggest that they have a nematic character.

[1] M. Frachet, I. Vinograd et al., Nature Physics 16, 1064-1068 (2020)
[2] M. Frachet et al., arXiv :2011.00562 (2020)
[3] M. -H. Julien, Physica B 329-333 (2003) 693

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Presenters

  • mehdi frachet

    Laboratoire National des Champs Magnetiques Intenses

Authors

  • mehdi frachet

    Laboratoire National des Champs Magnetiques Intenses

  • siham benhabib

    Laboratoire National des Champs Magnétiques Intenses, Laboratoire National des Champs Magnetiques Intenses

  • Igor Vinograd

    University of California, Davis, Physics, University of California, Davis, Laboratoire National des Champs Magnetiques Intenses

  • Shangfei Wu

    Department of Physics and Astronomy, Rutgers University, Laboratoire National des Champs Magnetiques Intenses

  • baptiste vignolle

    Institut de Chimie de la Matière Condensée de Bordeaux

  • Hadrien Mayaffre

    CNRS/GHMFL, Laboratoire National des Champs Magnetiques Intenses

  • Steffen Kraemer

    LNCMI Grenoble, Laboratoire National des Champs Magnetiques Intenses

  • Tohru Kurosawa

    Department of physics, Hokkaido University

  • Naoki Momono

    Muroran Institute of Technology

  • Migaku Oda

    Department of physics, Hokkaido University

  • Johan Chang

    Department of physics, University of Zurich

  • Cyril Proust

    Laboratoire National des Champs Magnétiques Intenses, Laboratoire National des Champs Magnetiques Intenses

  • Marc-Henri Julien

    CNRS/GHMFL, Laboratoire National des Champs Magnetiques Intenses

  • David LeBoeuf

    CNRS/GHMFL, Laboratoire National des Champs Magnetiques Intenses