2008年1月
Electronic structure of CeRu(2)X(2) (X=Si,Ge) in the paramagnetic phase studied by soft x-ray ARPES and hard x-ray photoelectron spectroscopy
PHYSICAL REVIEW B
- 巻
- 77
- 号
- 3
- 開始ページ
- 35118
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevB.77.035118
- 出版者・発行元
- AMER PHYSICAL SOC
Soft and hard x-ray photoelectron spectroscopy has been performed for one of the heavy fermion system CeRu(2)Si(2) and a 4f-localized ferromagnet CeRu(2)Ge(2) in the paramagnetic phase. The three-dimensional band structures and Fermi surface shapes of CeRu(2)Si(2) have been determined by soft x-ray h nu-dependent angle-resolved photoelectron spectroscopy. The differences in the Fermi surface topology and the non-4f electronic structures between CeRu(2)Si(2) and CeRu(2)Ge(2) are qualitatively explained by the band-structure calculation for both 4f itinerant and localized models, respectively. The Ce valences in CeRu(2)X(2) (X=Si,Ge) at 20 K are quantitatively estimated by the single impurity Anderson model calculation, where the Ce 3d hard x-ray core-level PES and Ce 3d x-ray absorption spectra have shown stronger hybridization and signature for the partial 4f contribution to the conduction electrons in CeRu(2)Si(2).
- リンク情報
- ID情報
-
- DOI : 10.1103/PhysRevB.77.035118
- ISSN : 1098-0121
- Web of Science ID : WOS:000252862900051