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

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

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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Category:Materials Science, Multidisciplinary

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