Interpretation of absorption edges by resonant electronic spectroscopy:: experiment and theory

被引:9
作者
Le Fèvre, P
Magnan, H
Chandesris, D
Jupille, J
Bourgeois, S
Drube, W
Ogasawara, H
Uozumi, T
Kotani, A
机构
[1] Univ Paris 11, CNRS, Lab Utilisat Rayonnement Electromagnet, F-91898 Orsay, France
[2] CEA, Serv Phys & Chim Surfaces & Interfaces, F-91191 Gif Sur Yvette, France
[3] SOLEIL, F-91192 Gif Sur Yvette, France
[4] Univ Paris 06, CNRS, Phys Solides Grp, F-75251 Paris, France
[5] Univ Paris 07, CNRS, Phys Solides Grp, F-75251 Paris, France
[6] Univ Bourgogne, UFR Sci & Tech, Lab Rech React Solides, F-21078 Dijon, France
[7] DESY, HASYLAB, D-22603 Hamburg, Germany
[8] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan
[9] Osaka Prefecture Univ, Grad Sch Engn, Sakai, Osaka 5998531, Japan
[10] RIKEN, SPRING8, Quantum Elect Mat Res Team, Sayo, Hyogo 6795148, Japan
[11] IMSS, Photon Factory, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan
关键词
non-radiative decay process; quadrupolar transition; spectroscopies;
D O I
10.1016/j.elspec.2004.02.130
中图分类号
O433 [光谱学];
学科分类号
0703 ; 070302 ;
摘要
Resonant electronic spectroscopy consists in measuring a non-radiative decay process (Auger or autoionization process) excited with photon energies around an absorption edge. The resonant spectra carry information both on the nature of the electronic transitions near the absorption edge by scanning the very first empty orbitals above the Fermi level (through the absorption process), and, on the other hand, on the atomic electronic configuration through the lineshape of the observed decay process. In this paper, after a quick review of the pioneering works in this field, we show that resonant measurements and their theoretical modeling can be used to precisely interpret complex absorption spectra. Hence, Ce resonant 3d photoemission spectra allow, in the Ce-L-3 edge, to attribute the two white lines to 4f(1) and 4f(0) final state electronic configurations and to evidence the presence of a hidden 4f(2) structure in the rise of the absorption threshold. Quadrupolar transitions towards localized 3d orbitals are also detected and quantitatively characterized in the titanium K-edge prepeaks in TiO2, thanks to angular dependent resonant Ti-KLL Auger measurements. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:37 / 47
页数:11
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