Temperature dependence of high-resolution resonant photoemission spectra of CeSi

High-resolution Ce 4d–4f resonant photoemission spectra near the Fermi level of CeSi with the Néel temperature of 5.9 K have been measured at temperatures from 5.6 to 200 K, in order to investigate the competition between the Ruderman–Kittel–Kasuya–Yoshida (RKKY) interaction and the Kondo effect. As...

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Bibliographic Details
Published in:Journal of electron spectroscopy and related phenomena 2005-06, Vol.144 (Complete), p.715-718
Main Authors: Mimura, Kojiro, Noguchi, Satoru, Suzuki, Mitsuharu, Higashiguchi, Mitsuharu, Shimada, Kenya, Ichikawa, Kouichi, Taguchi, Yukihiro, Namatame, Hirofumi, Taniguchi, Masaki, Aita, Osamu
Format: Article
Language:English
Subjects:
CeSi
Electronic structure
Kondo effect
Photoemission spectroscopy
RKKY interaction
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Summary:High-resolution Ce 4d–4f resonant photoemission spectra near the Fermi level of CeSi with the Néel temperature of 5.9 K have been measured at temperatures from 5.6 to 200 K, in order to investigate the competition between the Ruderman–Kittel–Kasuya–Yoshida (RKKY) interaction and the Kondo effect. As temperature is decreasing down to 30 K, the intensity due to the Ce 4 f 5 / 2 1 final state increases because of the evolution of the heavy Fermion behaviour caused by the Kondo effect. The intensity, however, decreases gradually from 30 to 5.6 K. This indicates that the heavy Fermion behaviour is strongly suppressed by the anti-ferromagnetic ordering due to the RKKY interaction.
ISSN:0368-2048
1873-2526
DOI:10.1016/j.elspec.2005.01.164