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|Date and time:||15th January (Wed.) 14:30〜|
|Place:||SPring-8, "HOUKOUKAN" seminar room|
|Title:||Theory of magnetic resonant inelastic x-ray scattering in cuprates and iridates|
|講演者:||長尾辰哉 氏 （群馬大学）|
|Speaker:||Prof. Tatsuya Nagao (Gunma University)|
Resonant inelastic x-ray scattering (RIXS) has been emerging as a promising probe to elucidate the excitation spectra of the electrons. In particular, we focus on the magnetic excitation of the system probed by RIXS. From a theoretical point of view, it is non-trivial to extract the magnetic excitation from the scattering process between the electrons and photons. For instance, different considerations are needed when we discuss the magnetic RIXS around the different absorption edges. We see that the treatment at the K-edge is straightforward, while that at the L edge needs an extra caution, which we overcome by introducing the projection method. In this talk, we briefly explain theoretical framework to investigate the magnetic RIXS spectra in transition-metal oxides at the K and L edges. It is applied to some cuprates and Sr2IrO4. We show that the calculated magnetic RIXS spectra capture the characteristic behaviors the experimental data exhibit. In addition, several predictions, such as the splitting of the excitation modes in Sr2IrO4 will be addressed.