Many-body effects in magnetic circular dichroism at Ce L2,3 absorption edges in CeFe2

被引：2
|
作者：
Asakura, K
Fukui, K
Ogasawara, H
Harada, I
Parlebas, JC
Kotani, A
机构：
[1] Okayama Univ, Fac Sci, Dept Phys, Okayama 7008530, Japan
[2] RIKEN, SPring 8, Mikazuki, Hyogo 6795148, Japan
[3] Univ Tokyo, ISSP, Kashiwa, Chiba 2778581, Japan
[4] CNRS, PCMS, GEMM, UMR 7504, F-67034 Strasbourg, France
[5] Inst Mat Struct Sci, Photon Factory, Tsukuba, Ibaraki 3050801, Japan
来源：
PHYSICA B-CONDENSED MATTER | 2004年 / 345卷 / 1-4期
关键词：
cluster model; magnetic circular dichroism; L-2; L-3 absorption edges;
D O I：
10.1016/j.physb.2003.11.054
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Magnetic circular dichroism (MCD) of the X-ray absorption spectroscopy (XAS) at the Cc L-2,L-3 edges in a typical mixed valence compound, CeFe2, is theoretically studied by using the impurity Anderson model combined with a cluster approach. We find that the hybridization of Ce 5d states with spin-polarized Fe 3d states is responsible for the differences between XAS and MCD, while the Coulomb interaction of a photo-excited 5d electrons plays a novel role, in addition to the many body effects yielding the two-peak structure of XAS. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：201 / 204
页数：4
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