Theory of photoemission from localized adsorbate levels
Theory of photoemission from localized adsorbate levels
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局部吸附物水平的光电子发射理论
DOI：
10.1103/physrevb.13.544
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发表时间：
1976
期刊：
影响因子：
--
通讯作者：
A. Liebsch
中科院分区：
文献类型：
--
作者：
A. Liebsch
详细分析了最近发展起来的理论的角度和能量分辨光电子从本地化吸附水平。终态的非平面波性质起源于周围原子对出射波的反复散射，这构成了该理论的基本特征。它示出，由此产生的干扰导致实验观察到的结构中的光电子能谱，这是敏感的吸附物相对于基板的位置。重点放在从简单的，atomiclike轨道的排放，因为它们允许一个明确的识别最终状态的相互作用。样品的计算进行说明这些影响的情况下，从吸附物2 s的水平排放的硫单层镍基板上。
A detailed analysis of a recently developed theory of the angle-and energy-resolved photoemission from localized adsorbate levels is presented. The non-plane-wave nature of the final state originating in the repeated scattering of the outgoing wave by the surrounding atoms constitutes the essential feature of this theory. It is shown that the resulting interferences lead to experimentally observable structure in photoemission spectra which is sensitive to the position of the adsorbate relative to the substrate. Emphasis is placed on the emission from simple, atomiclike orbitals since they permit an unambiguous identification of final-state interactions. Sample calculations are performed to illustrate these effects in the case of emission from the adsorbate 2 s level for a sulfur monolayer on a nickel substrate.