Coadsorption of samarium with oxygen on the molybdenum (211) surface

被引：6

作者：

Kuchowicz, M. ^{[1
]}

机构：

[1] Univ Wroclaw, Inst Expt Phys, PL-50204 Wroclaw, Poland

来源：

APPLIED SURFACE SCIENCE | 2010年 / 256卷 / 15期

关键词：

Samarium; Molybdenum; Oxygen; Coadsorption; Electronic structure; Mixed valence; XPS; VALENCE CHANGES; SM; ADSORPTION; STATE;

D O I：

10.1016/j.apsusc.2010.01.109

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Samarium atoms exist in two different electronic configurations, namely, divalent (Sm2+) and trivalent (Sm3+). Up to now, those two electronic configurations have been connected with the existence of Sm atoms in different valence states. Recent theoretical calculations performed by Yakovkin [9] show that both electronic configurations have similar LDOS around the Fermi level, and as a result, should give a similar photoelectron emission in the valence band region, which was identified earlier as the emission from the Sm2+ state. The Sm3+ signal in photoelectron emission could originate from contaminations of Sm by other elements, e. g. oxygen. To check the influence of O on the electronic structure of Sm, the XPS experiments of coadsorption of O and Sm have been performed. (C) 2010 Elsevier B. V. All rights reserved.

引用

页码：4818 / 4821

页数：4

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