TY - CHAP
T1 - Resonant X-ray scattering and orbital degree of freedom in correlated electron systems
AU - Ishihara, Sumio
N1 - Funding Information:
We thank T. Arima, A.R. Baron, Y. Endoh, K. Hirota, D.J. Huang, T. Inami, K. Ishii, T. Matsumura, S. Maekawa, J. Mizuki, Y. Murakami, H. Nakao, J. Nasu, H. Sawa and Y. Wakabayashi for their collaborations and helpful discussions. This work was supported by MEXT KAKENHI Grant Nos. 26287070 and 15H02100. Some of the numerical calculations were performed using the facilities of the Supercomputer Center, the Institute for Solid State Physics, the University of Tokyo.
Publisher Copyright:
� Springer-Verlag Berlin Heidelberg 2017.
PY - 2017/1/1
Y1 - 2017/1/1
N2 - 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.
AB - 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.
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U2 - 10.1007/978-3-662-53227-0_1
DO - 10.1007/978-3-662-53227-0_1
M3 - Chapter
AN - SCOPUS:85008235309
T3 - Springer Tracts in Modern Physics
SP - 1
EP - 45
BT - Springer Tracts in Modern Physics
PB - Springer Verlag
ER -