X-ray crystal structure analysis and Ru valence of Ba4Ru 3O10 single crystals

Taichi Igarashi, Yoshio Nogami, Yannick Klein, Gwenaelle Rousse, Ryuji Okazaki, Hiroki Taniguchi, Yukio Yasui, Ichiro Terasaki

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Abstract

We present a single-crystalline x-ray diffraction study on Ba4Ru3O10 consisting of corner-shared Ru3O12 trimers. The crystal structure is redetermined from 78 to 300K across an antiferromagnetic transition at 105 K. The orthorhombic symmetry (Cmca, space group No. 64) is preserved at all temperatures measured. This structure presents exceptionally long Ru-O distances characterized by a significant distribution within the Ru 3O12 trimer. A bond valence sum calculation suggests that the charge disproportionation within the Ru3O12 trimer emerges even at room temperature, which we ascribe to molecular orbital formation in the Ru3O12 trimer, as supported by the results of recent theoretical calculations. On the basis of the analyzed crystal structure, the electronic states and the nature of the phase transition at 105K are discussed.

Original languageEnglish
Article number104603
JournalJournal of the Physical Society of Japan
Volume82
Issue number10
DOIs
Publication statusPublished - Oct 2013

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Keywords

  • Antiferromagnetism
  • Metal-insulator transition
  • Ru oxide
  • X-ray diffraction

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Igarashi, T., Nogami, Y., Klein, Y., Rousse, G., Okazaki, R., Taniguchi, H., Yasui, Y., & Terasaki, I. (2013). X-ray crystal structure analysis and Ru valence of Ba4Ru 3O10 single crystals. Journal of the Physical Society of Japan, 82(10), [104603]. https://doi.org/10.7566/JPSJ.82.104603