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arXiv · 2510.24277

Soft and hard x-ray orbital-resolved photoemission study of a strongly correlated Cd-Ce quasicrystal approximant

Goro Nozue·Hidenori Fujiwara·Satoru Hamamoto·Miwa Tsutsumi·Akane Ose·Takayuki Kiss·Atsushi Higashiya·Atsushi Yamasaki·Yuina Kanai-Nakata·Shin Imada·Masaki Oura·Kenji Tamasaku·Makina Yabashi·Tetsuya Ishikawa·Farid Labib·Shintaro Suzuki·Ryuji Tamura·Akira Sekiyama
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Abstract

We have investigated the orbital-dependent electronic states of Cd6Ce, a prototype of strongly correlated rare-earth-based Tsai-type quasicrystals and approximants (ACs) by soft and hard x-ray photoemission spectroscopy. Our results reveal that the 4f orbitals are predominantly hybridized with the valence-band electrons far from the Fermi level (EF), in sharp contrast to the hybridization with conduction electrons at EF seen for the intermetallic Ce-based compounds. This anomalous hybridization should be taken into account in discussing the unresolved magnetic ground state in Cd6Ce. These findings suggest that Cd-based ACs, some of which show the multi-step magnetic transitions, could provide a new platform for investigating novel magnetic properties that cannot be understood within the conventional framework of hybridization at EF.

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Goro Nozue, Hidenori Fujiwara, Satoru Hamamoto, Miwa Tsutsumi, Akane Ose, Takayuki Kiss, Atsushi Higashiya, Atsushi Yamasaki, Yuina Kanai-Nakata, Shin Imada, Masaki Oura, Kenji Tamasaku, Makina Yabashi, Tetsuya Ishikawa, Farid Labib, Shintaro Suzuki, Ryuji Tamura, Akira Sekiyama. 2025-10-28. Soft and hard x-ray orbital-resolved photoemission study of a strongly correlated Cd-Ce quasicrystal approximant. https://doi.org/10.1103/4bz3-ccqt

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