Two-photon photoemission from the adsorption-induced electronic states of benzene/Cu(111)

被引：11
|
作者：
Munakata, T [1 ]
Shudo, K [1 ]
机构：
[1] Inst Phys & Chem Res, Wako, Saitama 3510198, Japan
来源：
SURFACE SCIENCE | 1999年 / 433卷
关键词：
aromatics; chemisorption; copper; laser methods; photoelectron spectroscopy; surface electronic phenomena;
D O I：
10.1016/S0039-6028(99)00053-9
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
An occupied electronic state induced by benzene adsorption on Cu(111) has been observed by means of two-photon photoemission (2PPE) spectroscopy measured with various photon energies from 4.05 to 4.37 eV. The 2PPE spectrum was composed of two features: one is fixed at an initial state binding energy of -0.3 eV relative to the Fermi level (E-F), the other, fixed at an intermediate state energy of 3.8 eV above E-F. The former arises from the bonding state between benzene and copper, the latter, from an image potential state on the benzene adsorbed surface. Photoemission from the adsorption-induced bonding state, which is weak in conventional one photon photoemission, is greatly enhanced by resonance with the image potential state. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：184 / 187
页数：4
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