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- Title
Two-dimensional Kβ-Kα fluorescence spectrum by nonlinear resonant inelastic X-ray scattering.
- Authors
Tamasaku, Kenji; Taguchi, Munetaka; Inoue, Ichiro; Osaka, Taito; Inubushi, Yuichi; Yabashi, Makina; Ishikawa, Tetsuya
- Abstract
High sensitivity of the Kβ fluorescence spectrum to electronic state is widely used to investigate spin and oxidation state of first-row transition-metal compounds. However, the complex electronic structure results in overlapping spectral features, and the interpretation may be hampered by ambiguity in resolving the spectrum into components representing different electronic states. Here, we tackle this difficulty with a nonlinear resonant inelastic X-ray scattering (RIXS) scheme, where we leverage sequential two-photon absorption to realize an inverse process of the Kβ emission, and measure the successive Kα emission. The nonlinear RIXS reveals two-dimensional (2D) Kβ-Kα fluorescence spectrum of copper metal, leading to better understanding of the spectral feature. We isolate 3d-related satellite peaks in the 2D spectrum, and find good agreement with our multiplet ligand field calculation. Our work not only advances the fluorescence spectroscopy, but opens the door to extend RIXS into the nonlinear regime. X-ray fluorescence spectroscopy is a powerful tool to investigate atomic properties. Here the authors report a two-dimensional fluorescence spectrum of copper metal using X-ray nonlinear scattering and find two-hole satellite feature resulting from atomic transitions.
- Subjects
X-ray scattering; FLUORESCENCE spectroscopy; INELASTIC scattering; LIGAND field theory; X-ray spectroscopy; COPPER spectra; X-ray fluorescence; NONLINEAR optical spectroscopy
- Publication
Nature Communications, 2023, Vol 14, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-023-39967-4