Character of valence-band states in the Kondo surface alloys CeAgx/Ag(111) and CePt5/Pt(111)
Character of valence-band states in the Kondo surface alloys CeAgx/Ag(111) and CePt5/Pt(111)
复制标题
近藤表面合金CeAgx/Ag(111)和CePt5/Pt(111)的价带态特征
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
F. Reinert
中科院分区：
文献类型：
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作者：
H. Schwab;M. Mulazzi;Jian Jiang;H. Hayashi;T. Habuchi;Daisuke Hirayama;H. Iwasawa;K. Shimada;F. Reinert
用低能电子衍射和角分辨光电子能谱研究了CePt5和CeAgx表面合金的晶体结构和电子结构。从4d-4f吸收边附近的测量，我们能够推断出4f电子光谱函数相对于单粒子态密度的权重。在CePt5表面合金的费米能级(Kondo共振和自旋轨道伙伴)处观察到典型的Kondo特征，而在CeAgx表面合金中只存在f0电离结构和自旋轨道伙伴.通过我们的实验，并通过与模型计算的比较，我们能够估计这两个系统的近藤温度，并研究影响杂交强度的参数。
The crystal and electronic structures of the CePt5 and CeAgx surface alloys have been investigated by means of low-energy electron diffraction and angle-resolved photoelectron spectroscopy. From measurements performed near the 4d-4f absorption edge we were able to infer the weight of the 4f -electron spectral function with respect to the single-particle density of states. While the typical Kondo features at the Fermi energy (Kondo resonance and spin-orbit partner) in the CePt5 surface alloy were observed, only the f 0 ionization structure and the spin-orbit partner were present in the CeAgx case. From our experiments, and by comparison to model calculations, we were able to estimate the Kondo temperature in the two systems and investigate parameters contributing to the hybridization strength.