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Enhanced spin-phonon-electronic coupling in a 5d oxide

Author

Listed:
  • S. Calder

    (Oak Ridge National Laboratory)

  • J. H. Lee

    (Oak Ridge National Laboratory
    School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST))

  • M. B. Stone

    (Oak Ridge National Laboratory)

  • M. D. Lumsden

    (Oak Ridge National Laboratory)

  • J. C. Lang

    (Advanced Photon Source, Argonne National Laboratory)

  • M. Feygenson

    (Oak Ridge National Laboratory)

  • Z. Zhao

    (Oak Ridge National Laboratory
    University of Tennessee)

  • J.-Q. Yan

    (Oak Ridge National Laboratory
    University of Tennessee)

  • Y. G. Shi

    (Institute of Physics, Chinese Academy of Sciences
    Superconducting Properties Unit, National Institute for Materials Science)

  • Y. S. Sun

    (Superconducting Properties Unit, National Institute for Materials Science
    Present address: Center of Condensed Matter and Materials Physics, Beihang University, Beijing 100191, China.)

  • Y. Tsujimoto

    (Materials Processing Unit, National Institute for Materials Science)

  • K. Yamaura

    (Superconducting Properties Unit, National Institute for Materials Science
    Graduate School of Chemical Sciences and Engineering, Hokkaido University)

  • A. D. Christianson

    (Oak Ridge National Laboratory
    University of Tennessee)

Abstract

Enhanced coupling of material properties offers new fundamental insights and routes to multifunctional devices. In this context 5d oxides provide new paradigms of cooperative interactions that drive novel emergent behaviour. This is exemplified in osmates that host metal–insulator transitions where magnetic order appears intimately entwined. Here we consider such a material, the 5d perovskite NaOsO3, and observe a coupling between spin and phonon manifested in a frequency shift of 40 cm−1, the largest measured in any material. The anomalous modes are shown to involve solely Os–O interactions and magnetism is revealed as the driving microscopic mechanism for the phonon renormalization. The magnitude of the coupling in NaOsO3 is primarily due to a property common to all 5d materials: the large spatial extent of the ion. This allows magnetism to couple to phonons on an unprecedented scale and in general offers multiple new routes to enhanced coupled phenomena in 5d materials.

Suggested Citation

  • S. Calder & J. H. Lee & M. B. Stone & M. D. Lumsden & J. C. Lang & M. Feygenson & Z. Zhao & J.-Q. Yan & Y. G. Shi & Y. S. Sun & Y. Tsujimoto & K. Yamaura & A. D. Christianson, 2015. "Enhanced spin-phonon-electronic coupling in a 5d oxide," Nature Communications, Nature, vol. 6(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms9916
    DOI: 10.1038/ncomms9916
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