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説明:

Transition-metal ions with 5d2 electronic configuration in a cubic crystal field are prone to have a vanishing dipolar magnetic moment but finite higher-order multipolar moments, and they are expected to exhibit exotic physical properties. Through an investigation using resonant inelastic X-ray scattering (RIXS), Raman spectroscopy, and theoretical ligand-field (LF) multiplet and ab initio calculations, we fully characterized the local electronic structure of Ba2CaOsO6, particularly, the crystal-field symmetry of the 5d2 electrons in this anomalous material. The low energy multiplet excitations from RIXS at the oxygen K edge and Raman-active phonons both show no splitting. These findings are consistent with the ground state of Os ions dominated by magnetic octupoles. Obtained parameters pave the way for further realistic microscopic studies of this highly unusual class of materials, advancing our understanding of spin-orbit physics in systems with higher-order multipoles.

権利情報:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

キーワード: Ba2CaOsO6, RIXS

刊行年月日: 2025-04-27

出版者: Springer Science and Business Media LLC

掲載誌:

• npj Quantum Materials (ISSN: 23974648) vol. 10 issue. 1 44

研究助成金:

• Japan Society for the Promotion of Science JP20K14416
• Japan Society for the Promotion of Science JP22K03535
• Russian Science Foundation RSF 23-42-00069
• National Science and Technology Council 103-2112-M-213-008-MY3
• National Science and Technology Council,Taiwan 113-2112-M-007-033

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5454

公開URL: https://doi.org/10.1038/s41535-025-00757-4

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更新時刻: 2025-04-30 12:30:15 +0900

MDRでの公開時刻: 2025-04-30 12:23:10 +0900