Quantitative study of the f occupation in CeMIn5 and other cerium compounds with hard X-rays
Quantitative study of the f occupation in CeMIn5 and other cerium compounds with hard X-rays
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DOI：
10.1016/j.elspec.2016.02.002
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发表时间：
2016-05-01
影响因子：
1.9
通讯作者：
Severing, A.
中科院分区：
文献类型：
--
作者：
Sundermann, M.;Strigari, F.;Severing, A.
我们提出了Ce 3d芯能级的体敏硬X射线光电子能谱（HAXPES）数据和CeMIn 5族（M=Co，Rh，用全多重态和组态相互作用模型相结合的方法对HAXPES数据进行了定量分析，该模型允许对CeMIn 5中的强等离子体激元进行校正HAXPES数据，和可靠的权重w（n）的不同的f（n）的贡献在基态确定。CeMIn 5的结果进行了比较，HAXPES数据的其他重费米子化合物和系统的降低的杂化强度V-eff从CePd 3到CeRh 3B 2到CeRu 2Si 2观察到，而它是最小的三个CeMIn 5化合物。然而，f-占据以相同的顺序增加，并且接近CeMIn 5家族的1。的PFY-XAS数据确认在三个CeMIn 5化合物和现象学拟合这些PFY-XAS数据结合配置相互作用模型产生一致的结果相同的f-职业。(C)2016年6月，作者。由爱思唯尔公司出版
We present bulk-sensitive hard X-ray photoelectron spectroscopy (HAXPES) data of the Ce3d core levels and lifetime-reduced L-edge X-ray absorption spectroscopy (XAS) in the partial fluorescence yield (PFY) mode of the CeMIn5 family with M=Co, Rh, and Ir. The HAXPES data are analyzed quantitatively with a combination of full multiplet and configuration interaction model which allows correcting for the strong plasmons in the CeMIn5 HAXPES data, and reliable weights w(n) of the different f(n) contributions in the ground state are determined. The CeMIn5 results are compared to HAXPES data of other heavy fermion compounds and a systematic decrease of the hybridization strength V-eff from CePd3 to CeRh3B2 to CeRu2Si2 is observed, while it is smallest for the three CeMIn5 compounds. The f-occupation, however, increases in the same sequence and is close to one for the CeMIn5 family. The PFY-XAS data confirm an identical f-occupation in the three CeMIn5 compounds and a phenomenological fit to these PFY-XAS data combined with a configuration interaction model yields consistent results. (C) 2016 The Authors. Published by Elsevier B.V.