Spin- and Circular-Polarized Resonant Photoemission

小行星9625340 这项研究的目的是确定的性质和行为 强关联电子系统中的准粒子 哪里 乐队的形成发挥了一个 重要的作用 常规 分析困难 的 通过将自旋分析与过渡金属2P（L3）光吸收边缘附近的圆偏振软X射线辐射相结合，将避免来自非铁磁体的自旋偏振光电发射。 这些光电发射测量将用于 首次 扩大应用范围 自旋分辨光电子能谱对所有过渡金属材料， 的 它们的磁 状态 （铁磁、反铁磁等）。新技术将应用于简单的过渡金属氧化物，高Tc超导体和窄带铁磁体。这些实验将使用欧洲和美国最先进的第三代同步辐射光源。 对磁性材料的基本理解仍然不完整，特别是对于磁性电子彼此强烈相互作用的材料。这些都是高度 相关电子系统，包括 高温超导体这个项目利用了最先进的 同步辐射源产生 磁性材料的光发射电子。光电子的磁性（自旋极化）分析 收益率 关于磁性材料本身的重要信息。该项目的结果将检验目前关于高度相关电子系统中磁性起源的理论。这些信息主要是基本利益，其结果可能导致新的磁性和超导材料的发展。 ***

9625340 Sinkovich The objective of this research is to determine the nature and behavior of quasiparticles in strongly correlated electron systems, where band formation plays an important role. Conventional difficulties in analysis of spin polarized photoemission from non-ferromagnets will be circumvented by combining the spin analysis with circularly polarized soft-x-ray radiation in the vicinity of the transition metal 2P (L3) photoabsorption edge. These photo emission measurements will for the first time extend the application of spin-resolved photoemission spectroscopy to all transition metal materials irrespective of their magnetic state (ferromagnetic, antiferromagnetic, etc.). The new techniques will be applied to simple transition metal oxides, high-Tc superconductors, and narrow band ferromagnets. The experiments will use state-of-theart third generation synchrotron radiation sources in Europe and the United States. %%% The fundamental understanding of magnetic materials remains incomplete, particularly for the class of materials in which the magnetic electrons interact strongly with one another. These are highly correlated electron systems, and include the high temperature superconductors. This project exploits state-of-theart synchrotron radiation sources to produce photoemitted electrons from magnetic materials. An analysis of the magnetism (spin polarization) of the photoelectrons yields crucial information about the magnetic materials themselves. The results of the project will test current theories of the origin of magnetism in highly correlated electron systems. The information is primarily of fundamental interest and the results may lead to development of new magnetic and superconducting materials. ***