Resonant X-ray scattering and orbital degree of freedom in correlated electron systems

Sumio Ishihara

Research output: Chapter in Book/Report/Conference proceedingChapter


The resonant X-ray scattering (RXS) and the resonant inelastic X-ray scattering (RIXS) in correlated electron systems with the orbital degree of freedom are reviewed from the theoretical view points. In the first part, the orbital order and RXS as an experimental tool to detect the orbital order are reviewed. We introduce characteristic interacting-orbital models and orbital orders, in which a unique orbital frustration effect emerges. As a case study, the theoretical and experimental studies in an impurity effect on the orbital order are presented. In the second part, the RIXS studies for observation of the orbital excitation are reviewed. In particular, we focus on the polarization dependence of RIXS which is crucial to identify the scattering from the orbital excitation. We introduce the recent progresses of the collective orbital excitations coupled with the lattice vibration. The non-resonant inelastic X-ray scattering as a tool to detect the orbital excitations is also reviewed.

Original languageEnglish
Title of host publicationSpringer Tracts in Modern Physics
PublisherSpringer Verlag
Number of pages45
Publication statusPublished - 2017 Jan 1

Publication series

NameSpringer Tracts in Modern Physics
ISSN (Print)0081-3869

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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