Excitonic dispersion of the intermediate spin state in LaCoO3 revealed by resonant inelastic x-ray scattering

Ru Pan Wang, Atsushi Hariki, Andrii Sotnikov, Federica Frati, Jun Okamoto, Hsiao Yu Huang, Amol Singh, Di Jing Huang, Keisuke Tomiyasu, Chao Hung Du, Jan Kuneš, Frank M.F. De Groot

研究成果: Article査読

16 被引用数 (Scopus)

抄録

We report Co L3-edge resonant inelastic x-ray scattering on LaCoO3 at 20 K. We observe excitations with sizable dispersion that we identify as intermediate-spin (IS) states. Theoretical calculations that treat the IS states as mobile excitons propagating on the low-spin background support the interpretation. The present result shows that mobility substantially reduces the energy of IS excitations in part of the Brillouin zone, which makes them important players in the low-energy physics of LaCoO3 together with immobile high-spin excitations.

本文言語English
論文番号035149
ジャーナルPhysical Review B
98
3
DOI
出版ステータスPublished - 2018 7 31

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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