Development of a novel technique to reveal electronic structure in solids by wide-energy high-resolution photoemission spectroscopy

在本项目中，我们利用三维软x射线角度分辨、硬x射线和极低能光电发射进行了组合光电发射光谱，以揭示强相关电子系统的体电子结构。我们还开发了一种新的光发射技术，称为偏振依赖硬x射线光发射，通过该技术可以检测固体中价带的轨道分布。实际上，通过这种方法，我们发现金和银的传导电子的轨道对称性是相互不同的，而且在性质上是不同的。

In this project we have performed the combinational photoemission spectroscopy using 3D soft x-ray angle-resolved, hard x-ray, and extremely low-energy photoemission in order to reveal the bulk electronic structure of strongly correlated electron systems. We have also developed a novel technique of photoemission called as polarization-dependent hard x-ray photoemission, by which the orbital distributions to the valence bands in solids can be detected. Actually we have found that the orbital symmetry of the conduction electrons are mutually and qualitatively different between gold and silver by using this technique.