Localized character of 4f electrons in CeRhx (x=2,3) and CeNix (x=2,5).
Localized character of 4f electrons in CeRhx (x=2,3) and CeNix (x=2,5).
复制标题
CeRhx (x=2,3) 和 CeNix (x=2,5) 中 4f 电子的局域特征。
DOI：
10.1103/physrevlett.91.157601
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发表时间：
2003
影响因子：
8.6
通讯作者：
J
中科院分区：
文献类型：
--
作者：
R. Jung;Byung;S. Oh;Hyeong;E. Cho;T. Iwasaki;A. Sekiyama;S. Imada;S. Suga;J
用体敏共振光电子能谱技术在Ce M5（3d（5/2）->4f）边测量了Ce过渡金属间化合物CeRhx（x= 2，3）和CeNix（x= 2，5）的Ce 4f谱权。高的能量分辨率和在此光子能量下较长的光发射电子逃逸深度使我们能够分辨出费米能级处尖锐的近藤共振尾，这可以用基于安德森杂质哈密顿量的Gunnarsson-Schönhammer计算很好地描述。另一方面，巡回4f带描述显示出很大的差异，这意味着Ce 4f电子保留本地化字符，即使在非常α类化合物。
We have measured Ce 4f spectral weights of extremely alpha-like Ce transition metal intermetallic compounds CeRhx (x=2,3) and CeNix (x=2,5) by using the bulk-sensitive resonant photoemission technique at the Ce M5(3d(5/2)-->4f) edge. High energy resolution and longer escape depth of photoemitted electron at this photon energy enabled us to distinguish the sharp Kondo resonance tails at the Fermi level, which can be well described by the Gunnarsson-Schönhammer calculation based on the Anderson impurity Hamiltonian. On the other hand, the itinerant 4f band description shows big discrepancies, which implies that Ce 4f electrons retain localized characters even in extremely alpha-like compounds.