Photoelectron Angular Distribution Induced by Weak Intermolecular Interaction in Highly Ordered Aromatic Molecules
Photoelectron Angular Distribution Induced by Weak Intermolecular Interaction in Highly Ordered Aromatic Molecules
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DOI：
10.1021/acs.jpcc.8b08346
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发表时间：
2018-10
期刊：
影响因子：
--
通讯作者：
H. Yamane;N. Kosugi
中科院分区：
文献类型：
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作者：
H. Yamane;N. Kosugi
从分子轨道的空间分布和分子电子态的相互作用的角度来讨论有机薄膜的光电性质，光电子角分布是必不可少的。讨论了高序芳分子中弱分子间相互作用对角分辨光发射光谱（ARPES）测定的光电子角分布的影响。对Au（111）上多环芳烃（PAHs）超结构的实验和理论研究表明，在轨道层析模拟中至少需要考虑分子内单散射过程。此外，各种多环芳烃单分子膜的ARPES谱显示，弱π带色散依赖于单分子膜的表面布里渊区，而不依赖于衬底。高序芳族分子中长距离的分子间横向相互作用在π带d中起主要作用。
The photoelectron angular distribution of organic thin films is essential in the discussion of the (opto)electronic properties from the viewpoints of the spatial distribution of molecular orbitals and the interaction of molecular electronic states. We discuss the role of the weak intermolecular interaction in highly ordered aromatic molecules on the photoelectron angular distribution obtained by angle-resolved photoemission spectroscopy (ARPES). The experimental and theoretical investigation performed for superstructures of polycyclic aromatic hydrocarbons (PAHs) on Au(111) indicates that at least the intramolecular single-scattering process is necessary to be considered in simulation of the orbital tomography. Furthermore, ARPES spectra for various PAH monolayers reveal that the weak π-band dispersion is dependent on the surface Brillouin zone of the monolayer but not of the substrate. The long-range lateral intermolecular interaction in highly ordered aromatic molecules plays a main role in the π-band d...