Bulk and Surface Band Dispersion Mapping of the Au(111) Surface by Acceptance-cone Tunable PES System
Bulk and Surface Band Dispersion Mapping of the Au(111) Surface by Acceptance-cone Tunable PES System
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Au(111)面体能带和表面色散谱图的接收锥面可调谐PES系统
DOI：
10.1380/ejssnt.2020.18
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发表时间：
2020-02
影响因子：
0.7
通讯作者：
F. Matsui;S. Makita;H. Matsuda;T. Ueba;T. Horigome;H. Yamane;Kiyohisa Tanaka;S. Kera;N. Kosugi
中科院分区：
文献类型：
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作者：
F. Matsui;S. Makita;H. Matsuda;T. Ueba;T. Horigome;H. Yamane;Kiyohisa Tanaka;S. Kera;N. Kosugi
二维角分辨光电子能谱是研究晶体表面电子结构的有效方法。最新版本的角分辨光电子能谱分析仪安装在UVSOR-III同步加速器的BL 6 U上。该谱仪由半球形电子分析器组成，该电子分析器配备有机械偏转器和靠近样品的网状静电透镜，以使接收锥的大小可调。通过对样品施加负偏压并使用机械偏转器，可以有效地获得大波数区域中的价带色散截面的恒定能量光电子角分布。本文给出了Au（111）表面的三维体能带和表面态色散图，以说明当前光电子能谱实验站的性能。我们重新审视了在这个动能制度的体和表面的电子结构的双重观察。
Two-dimensional angle-resolved photoelectron spectroscopy is a powerful method to study the electronic structure of a crystal surface. The latest version of the angle-resolved photoelectron spectroscopy analyzer was installed at the BL6U of the UVSOR-III Synchrotron. This spectrometer consists of a hemispherical electron analyzer equipped with a mechanical deflector and a mesh electrostatic lens close to the sample to make the size of acceptance cone tunable. A constant-energy photoelectron angular distribution of the valence band dispersion cross section in the large wave number region can be efficiently obtained by applying a negative bias voltage to the sample and using a mechanical deflector. Here, the three-dimensional bulk band and the surface state dispersion mappings of Au(111) surface are presented to show the performance of the current photoelectron spectroscopy experimental station. We revisited the dual observation of bulk and surface electronic structures at this kinetic energy regime.