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.
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页码：184 / 187
页数：4
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