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Spectroscopic signatures and origin of hidden order in Ba2MgReO6

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  • Jian-Rui Soh

    (Agency for Science Technology and Research (A*STAR)
    École Polytechnique Fédérale de Lausanne (EPFL))

  • Maximilian E. Merkel

    (ETH Zürich)

  • Leonid V. Pourovskii

    (Institut Polytechnique de Paris
    Université PSL)

  • Ivica Živković

    (École Polytechnique Fédérale de Lausanne (EPFL))

  • Oleg Malanyuk

    (École Polytechnique Fédérale de Lausanne (EPFL))

  • Jana Pásztorová

    (École Polytechnique Fédérale de Lausanne (EPFL))

  • Sonia Francoual

    (Deutsches Elektronen-Synchrotron DESY)

  • Daigorou Hirai

    (Nagoya University)

  • Andrea Urru

    (ETH Zürich)

  • Davor Tolj

    (École Polytechnique Fédérale de Lausanne (EPFL))

  • Dario Fiore Mosca

    (Institut Polytechnique de Paris
    Université PSL)

  • Oleg V. Yazyev

    (École Polytechnique Fédérale de Lausanne (EPFL))

  • Nicola A. Spaldin

    (ETH Zürich)

  • Claude Ederer

    (ETH Zürich)

  • Henrik M. Rønnow

    (École Polytechnique Fédérale de Lausanne (EPFL))

Abstract

Clarifying the underlying mechanisms that govern ordering transitions in condensed matter systems is crucial for comprehending emergent properties and phenomena. While transitions are often classified as electronically driven or lattice-driven, we present a departure from this conventional picture in the case of the double perovskite Ba2MgReO6. Leveraging resonant and non-resonant elastic x-ray scattering techniques, we unveil the simultaneous ordering of structural distortions and charge quadrupoles at a critical temperature of Tq ~ 33 K. Using a variety of complementary first-principles-based computational techniques, we demonstrate that, while electronic interactions drive the ordering at Tq, it is ultimately the lattice distortions that dictate the specific ground state that emerges. Our findings highlight the crucial interplay between electronic and lattice degrees of freedom, providing a unified framework to understand and predict unconventional emergent phenomena in quantum materials.

Suggested Citation

  • Jian-Rui Soh & Maximilian E. Merkel & Leonid V. Pourovskii & Ivica Živković & Oleg Malanyuk & Jana Pásztorová & Sonia Francoual & Daigorou Hirai & Andrea Urru & Davor Tolj & Dario Fiore Mosca & Oleg V, 2024. "Spectroscopic signatures and origin of hidden order in Ba2MgReO6," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-53893-z
    DOI: 10.1038/s41467-024-53893-z
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    References listed on IDEAS

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    1. L. Lu & M. Song & W. Liu & A. P. Reyes & P. Kuhns & H. O. Lee & I. R. Fisher & V. F. Mitrović, 2017. "Magnetism and local symmetry breaking in a Mott insulator with strong spin orbit interactions," Nature Communications, Nature, vol. 8(1), pages 1-8, April.
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