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Size dependence of L2,3 branching ratio and 2p core-hole screening in x-ray absorption of metal clusters.

Authors :
Lau JT
Rittmann J
Zamudio-Bayer V
Vogel M
Hirsch K
Klar P
Lofink F
Möller T
v Issendorff B
Source :
Physical review letters [Phys Rev Lett] 2008 Oct 10; Vol. 101 (15), pp. 153401. Date of Electronic Publication: 2008 Oct 07.
Publication Year :
2008

Abstract

Resonant 2p x-ray absorption spectra of size-selected transition metal ions and clusters consisting of 1<or=n<or=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.

Details

Language :
English
ISSN :
0031-9007
Volume :
101
Issue :
15
Database :
MEDLINE
Journal :
Physical review letters
Publication Type :
Academic Journal
Accession number :
18999595
Full Text :
https://doi.org/10.1103/PhysRevLett.101.153401