Calculation of 3s photoemission spectra of vanadium on graphite

被引:17
|
作者
Kruger, P [1 ]
Taguchi, M [1 ]
Parlebas, JC [1 ]
Kotani, A [1 ]
机构
[1] UNIV TOKYO,INST SOLID STATE PHYS,MINATO KU,TOKYO 106,JAPAN
来源
PHYSICAL REVIEW B | 1997年 / 55卷 / 24期
关键词
D O I
10.1103/PhysRevB.55.16466
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A few years ago, a satellite structure in the vanadium 3s x-ray photoemission spectroscopy (XPS) spectrum of V clusters upon graphite was observed and attributed to the presence of magnetic moments on the V surface. Here, we present calculations of these spectra using a cluster model that takes into account intra-atomic d-d and d-core electron correlation and hybridization between V d and graphite pi states. When the V-graphite distance is increased from 1.5 to 2.0 Angstrom the system undergoes a low-to-high spin transition, which is clearly evidenced in the evolution of the XPS line shape. Although direct comparison with experiment is difficult, our study suggests that the observed satellite is due to core hole screening rather than a magnetic moment on the V atom.
引用
收藏
页码:16466 / 16471
页数:6
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