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Strain control of a bandwidth-driven spin reorientation in Ca3Ru2O7

Author

Listed:
  • C. D. Dashwood

    (University College London)

  • A. H. Walker

    (University College London)

  • M. P. Kwasigroch

    (University College London
    Trinity College)

  • L. S. I. Veiga

    (University College London
    Harwell Science and Innovation Campus)

  • Q. Faure

    (University College London
    Université Paris-Saclay)

  • J. G. Vale

    (University College London)

  • D. G. Porter

    (Harwell Science and Innovation Campus)

  • P. Manuel

    (STFC Rutherford Appleton Laboratory)

  • D. D. Khalyavin

    (STFC Rutherford Appleton Laboratory)

  • F. Orlandi

    (STFC Rutherford Appleton Laboratory)

  • C. V. Colin

    (Université Grenoble Alpes, CNRS, Institut Néel)

  • O. Fabelo

    (Institut Laue-Langevin)

  • F. Krüger

    (University College London
    STFC Rutherford Appleton Laboratory)

  • R. S. Perry

    (University College London)

  • R. D. Johnson

    (University College London)

  • A. G. Green

    (University College London)

  • D. F. McMorrow

    (University College London)

Abstract

The layered-ruthenate family of materials possess an intricate interplay of structural, electronic and magnetic degrees of freedom that yields a plethora of delicately balanced ground states. This is exemplified by Ca3Ru2O7, which hosts a coupled transition in which the lattice parameters jump, the Fermi surface partially gaps and the spins undergo a 90∘ in-plane reorientation. Here, we show how the transition is driven by a lattice strain that tunes the electronic bandwidth. We apply uniaxial stress to single crystals of Ca3Ru2O7, using neutron and resonant x-ray scattering to simultaneously probe the structural and magnetic responses. These measurements demonstrate that the transition can be driven by externally induced strain, stimulating the development of a theoretical model in which an internal strain is generated self-consistently to lower the electronic energy. We understand the strain to act by modifying tilts and rotations of the RuO6 octahedra, which directly influences the nearest-neighbour hopping. Our results offer a blueprint for uncovering the driving force behind coupled phase transitions, as well as a route to controlling them.

Suggested Citation

  • C. D. Dashwood & A. H. Walker & M. P. Kwasigroch & L. S. I. Veiga & Q. Faure & J. G. Vale & D. G. Porter & P. Manuel & D. D. Khalyavin & F. Orlandi & C. V. Colin & O. Fabelo & F. Krüger & R. S. Perry , 2023. "Strain control of a bandwidth-driven spin reorientation in Ca3Ru2O7," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-41714-8
    DOI: 10.1038/s41467-023-41714-8
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