Presentation Information
[2D20]Emergence of strong c-f hybridization in the unoccupied states observed with RIXS
*Kaito Nishihara1, Takuto Nakamura2,1, Atsushi Hariki3, Yitong Chen1, Reo Miyagawa1, Rentaro Okamoto1, Yasuyuki Shimura4, Toshiro Takabatake4, Jun Miyawaki5, Naoya Kurahashi5, Kohei Yamamoto5, Hiroki Suga6, Daniel Jon Foster6, Miho Kitamura5, Fumi Nishino5, Hideaki Iwasawa5, Koji Horiba5, Tatsuhiko Kanda6, Akira Yasui6, Kenichi Ozawa7, Shin-ichi Kimura2,1,8 (1. Graduate School of Science, The University of Osaka (Japan), 2. Graduate School of Frontier Biosciences, The University of Osaka (Japan), 3. Graduate School of Engineering, Osaka Metropolitan University (Japan), 4. Graduate School of Advanced Science and Engineering, Hiroshima University (Japan), 5. National Institutes for Quantum Science and Technology (Japan), 6. Japan Synchrotron Radiation Research Institute (Japan), 7. Inter-University Research Institute Corporation High Energy Accelerator Research Organization (Japan), 8. Institute for Molecular Science (Japan))
High-energy-resolution resonant inelastic soft X-ray scattering (RIXS) and resonant angle-resolved photoelectron spectra at the Ce 3d-4f absorption edge of a quasi-kagome Kondo lattice material, CeRhSn, are reported. Owing to the strong magnetic frustration of the quasi-kagome Kondo lattice, CeRhSn is located near the quantum critical point where the magnetic ordering is competitive with the non-magnetic heavy fermion state, but strong hybridization between the localized Ce 4f states and conduction bands is expected. A significant intensity change in the RIXS spectra appears on cooling from 300 to 150 K across the Kondo temperature. This suggests the emergence of strong hybridization between the conduction bands and each of the unoccupied 4f5/2 and 4f7/2 states.
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