Adsorption geometry and electronic structure of iron phthalocyanine on Ag surfaces: A LEED and photoelectron momentum mapping study
Adsorption geometry and electronic structure of iron phthalocyanine on Ag surfaces: A LEED and photoelectron momentum mapping study
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DOI：
10.1016/j.susc.2013.10.020
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发表时间：
2014-03-01
期刊：
影响因子：
1.9
通讯作者：
Reinert, F.
中科院分区：
文献类型：
--
作者：
Feyer, V.;Graus, M.;Reinert, F.
本文研究了酞菁铁在银低指数晶面上的吸附行为。结合光电子动量映射和低能电子衍射对倒易空间的测量，重建了真实的空间吸附几何构型。在单层覆盖下，在所有研究的表面上都存在有序的超结构，在Ag（100）和Ag（111）的情况下，每个晶胞中含有一个分子，而对于Ag（110），每个晶胞中含有两个分子。从光电子动量图中导出了分子相对于衬底高对称方向的方位倾斜角。具有不同对称性的基板上的动量图案的比较分析表明，两个成分的双重简并FePc最低未占分子轨道被占据的电荷转移从基板在界面处。(C)2013爱思唯尔有限公司版权所有。
We present a comprehensive study of the adsorption behavior of iron phthalocyanine on the low-index crystal faces of silver. By combining measurements of the reciprocal space by means of photoelectron momentum mapping and low energy electron diffraction, the real space adsorption geometries are reconstructed. At monolayer coverage ordered superstructures exist on all studied surfaces containing one molecule in the unit cell in case of Ag(100) and Ag(111), and two molecules per unit cell for Ag(110). The azimuthal tilt angle of the molecules against the high symmetry directions of the substrate is derived from the photoelectron momentum maps. A comparative analysis of the momentum patterns on the substrates with different symmetry indicates that both constituents of the twofold degenerate FePc lowest unoccupied molecular orbital are occupied by charge transfer from the substrate at the interface. (C) 2013 Elsevier B.V. All rights reserved.