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Angle-resolved photoemission study of quasi-two-dimensional heavy-fermion compounds CeRhIn$$_5$$ and CeIrIn$$_5$$

CeRhIn$$_5$$とCeIrIn$$_5$$の角度分解光電子分光

藤森 伸一   ; 井野 明洋; 岡根 哲夫  ; 藤森 淳; 播磨 尚朝*; 青木 大*; 池田 修悟*; 宍戸 寛明*; 芳賀 芳範   ; 常盤 欣文; 大貫 惇睦

Fujimori, Shinichi; Ino, Akihiro; Okane, Tetsuo; Fujimori, Atsushi; Harima, Hisatomo*; Aoki, Dai*; Ikeda, Shugo*; Shishido, Hiroaki*; Haga, Yoshinori; Tokiwa, Yoshifumi; Onuki, Yoshichika

重い電子系化合物CeRhIn$$_5$$とCeIrIn$$_5$$に対して、角度分解光電子分光実験を行った。得られたスペクトルを、Ce 4$$f$$電子を遍歴として取り扱ったバンド計算の結果と比較したところ、Rh, Ir及びInによる状態は計算によって良く再現されたものの、Ce 4$$f$$電子の寄与が大きいフェルミ準位付近については一致が良くなかった。

We have performed angle resolved photoemission experiments on heavy-fermion compounds CeRhIn$$_5$$ and CeIrIn$$_5$$. The obtained spectra are compared with the results of the full-potential linear-augmented-plane-wave (FLAPW) band-structure calculations, treating the Ce 4$$f$$ electrons as being itinerant. The spectral contributions from the ligand Rh, Ir or In states were well reproduced by the calculations, although the features originated from Ce 4$$f$$ states near $$E_{rm F}$$ were not clearly observed.

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パーセンタイル:7.78

分野:Physics, Condensed Matter

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