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Nearly localized nature of $$f$$ electrons in Ce$$T$$In$$_5$$ ($$T$$=Rh, Ir)

Ce$$T$$In$$_5$$ ($$T$$=Rh, Ir)におけるほとんど局在した$$f$$電子状態

藤森 伸一; 岡根 哲夫; 岡本 淳; 間宮 一敏; 村松 康司; 藤森 淳*; 播磨 尚朝*; 青木 大*; 池田 修悟*; 宍戸 寛明*; 常盤 欣文*; 芳賀 芳範; 大貫 惇睦

Fujimori, Shinichi; Okane, Tetsuo; Okamoto, Jun; Mamiya, Kazutoshi; Muramatsu, Yasuji; Fujimori, Atsushi*; Harima, Hisatomo*; Aoki, Dai*; Ikeda, Shugo*; Shishido, Hiroaki*; Tokiwa, Yoshifumi*; Haga, Yoshinori; Onuki, Yoshichika

層状Ce化合物であり、磁性と超伝導の競合を示すCe$$T$$In$$_5$$ ($$T$$=Rh, Ir)に対して、紫外線光源による角度分解光電子分光と、放射光による3$$d$$-4$$f$$共鳴光電子分光を行った。実験の結果、両化合物においてCe 4$$f$$電子はほとんど局在しており、両者の電子状態が似通っていることが明らかとなった。

We have performed angle-resolved photoemission spectroscopy ($$hnu=21.2, 40.8$$~eV) and 3$$d$$-4$$f$$ resonant photoemission spectroscopy ($$hnu sim 881$$~eV) studies on the layered cerium compounds Ce$$T$$In$$_5$$ ($$T$$=Rh and Ir), which show competition between superconductivity and antiferromagnetism. The results suggest that the Ce~4$$f$$ electrons in both compounds are nearly localized. We have found that although the Ce~4$$f$$ electrons in the superconducting CeIrIn$$_5$$ are more delocalized than those in the antiferromagnetic CeRhIn$$_5$$, their electronic structures are very similar to each other.

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パーセンタイル:20.2

分野:Materials Science, Multidisciplinary

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