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Journal Articles

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*; et al.

Physical Review B, 67(14), p.144507_1 - 144507_5, 2003/04

https://doi.org/10.1103/PhysRevB.67.144507
 Times Cited Count：35 Percentile：79.47(Materials Science, Multidisciplinary)

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.

Journal Articles

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

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

Physica B; Condensed Matter, 312-313, p.132 - 133, 2002/03

https://doi.org/10.1016/S0921-4526(01)01476-4
 Times Cited Count：1 Percentile：7.52(Physics, Condensed Matter)

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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