Length scales in core level excitation: C 1s x-ray absorption of C-60/Al

被引：27

作者：

Maxwell, AJ ^{[1
]}

Bruhwiler, PA ^{[1
]}

Arvanitis, D ^{[1
]}

Hasselstrom, J ^{[1
]}

Martensson, N ^{[1
]}

机构：

[1] UNIV UPPSALA,DEPT PHYS,S-75121 UPPSALA,SWEDEN

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.79.1567

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present evidence for atomic site-dependent excitonic effects in the x-ray absorption spectrum of an ordered chemisorbed monolayer of C-60/Al(110). We observe that the broadening in the 5t(1u)-derived resonance and the corresponding core level resonant photoemission intensity varies with the x-ray incidence angle. This can be understood as due to changes in the strength of the interaction between the x-ray absorption final state and the substrate bands. This study provides the first direct measurement of the length scale for the localization of an excited state by the core hole.

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页码：1567 / 1570

页数：4

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