Size Dependence of L2,3 Branching Ratio and 2p Core-Hole Screening in X-Ray Absorption of Metal Clusters

被引：61

作者：

Lau, J. T. ^{[1
]}

Rittmann, J. ^{[1
]}

Zamudio-Bayer, V. ^{[1
]}

Vogel, M. ^{[1
]}

Hirsch, K. ^{[1
]}

Klar, Ph. ^{[1
]}

Lofink, F. ^{[1
]}

Moeller, T. ^{[1
]}

Von Issendorff, B. ^{[2
]}

机构：

[1] Tech Univ Berlin, Inst Opt & Atomare Phys, D-10623 Berlin, Germany

[2] Univ Freiburg, Fak Phys, D-79104 Freiburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.101.153401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Resonant 2p x-ray absorption spectra of size-selected transition metal ions and clusters consisting of 1 <= n <= 200 atoms are reported. Remnants of atomic multiplet splitting in L(2,3)-edge x-ray absorption can be resolved up to the trimer, above which the overall line shape is already bulklike. A strong cluster size dependence of the L(2,3) branching ratio was found for titanium, vanadium, and cobalt clusters. While 3d electron delocalization increases with cluster size, the apparent 2p spin-orbit splitting remains constant within the error bars. The size dependence of the L(2,3) branching ratio can be attributed to cluster size specific screening of the 2p-3d Coulomb interaction by 3d/4s valence electrons.

引用

页数：4

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