Electronic structure and evolution of the orbital state in metallic Ca2-x Srx Ru O4

Han Jin Noh, S. J. Oh, B. G. Park, J. H. Park, J. Y. Kim, H. D. Kim, T. Mizokawa, L. H. Tjeng, H. J. Lin, C. T. Chen, S. Schuppler, S. Nakatsuji, H. Fukazawa, Y. Maeno

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Abstract

We investigated the electronic structure of a layered Ca2-x Srx Ru O4 in a metallic regime (0.15≤x≤2.0) using a polarization dependent O 1s x-ray absorption spectroscopy. The spectrum shows strong variations with the polarization especially in Ru 4d region, which enables us to identify the electronic states. The spectral line shape gradually changes with increase of Sr concentration, and agrees well with an unrestricted Hartree-Fock analysis, which suggests evolution of the orbital states and provides clues for how the lattice distortion affects the orbital occupations.

Original languageEnglish
Article number052411
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume72
Issue number5
DOIs
Publication statusPublished - 2005 Aug 1
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Noh, H. J., Oh, S. J., Park, B. G., Park, J. H., Kim, J. Y., Kim, H. D., Mizokawa, T., Tjeng, L. H., Lin, H. J., Chen, C. T., Schuppler, S., Nakatsuji, S., Fukazawa, H., & Maeno, Y. (2005). Electronic structure and evolution of the orbital state in metallic Ca2-x Srx Ru O4. Physical Review B - Condensed Matter and Materials Physics, 72(5), [052411]. https://doi.org/10.1103/PhysRevB.72.052411