Electron Spectroscopy Studies of Narrow Band Materials

采用光电发射光谱和逆光电发射光谱技术对选定的窄带材料的电子结构进行了测量。在这些分光仪中，光子与电子的相互作用被用来确定电子的电离光谱和亲和能。这些实验是在密歇根大学的家庭实验室和各种国家同步加速器设施中进行的。将实验数据与以不同方式处理库仑相互作用的理论进行了比较分析，这些理论提供了光谱与电或磁性质之间的联系。因此，各种理论可以被测试，有可能发现新的现象。该计划依赖于与其他团体的紧密合作，以提供表征良好的样品进行测量，并提供专家理论建议和高级计算。用光电发射光谱和逆光电发射光谱技术测量了具有莫名其妙的电学和磁学性质的稀土和锕系金属的电子结构。在这些分光仪中，光子与电子的相互作用被用来确定电子的电离光谱和亲和能。这些实验是在密歇根大学的家庭实验室和各种国家同步加速器设施中进行的。将实验数据与以不同方式处理电子之间相互作用的理论进行了比较，并提供了光谱与电或磁性质之间的联系。因此，各种理论可以被测试，有可能发现新的现象。该计划依赖于与其他团体的紧密合作，以提供表征良好的样品进行测量，并提供专家理论建议和高级计算。＊＊＊

9423741 Allen The electronic structures of selected narrow band materials are measured by the techniques of photoemission and inverse photoemission spectroscopies. In these spectroscopes the interaction of photon with the electrons is used to determine the spectrum of ionization and affinity energies of the electrons. The experiments are performed both in a home laboratory at the University of Michigan, and at various national synchrotron facilities. The experimental data area analyzed by comparison to theories which treat the Coulomb interactions in different ways, and which provide a link between the spectra and the electrical or magnetic properties. Thereby the various theories can be tested, with the possibility for discovering new phenomena. The program relies on strong collaborations with other groups for providing well characterized sample to measure, and for expert theoretical advice and advanced calculations. %%% The electronic structures of rare-earth and actinide metals with puzzling electrical and magnetic properties are measured by the techniques of photoemission and inverse photoemission spectroscopies. In these spectroscopes the interaction of photon with the electrons is used to determine the spectrum of ionization and affinity energies of the electrons. The experiments are performed both in a home laboratory at the University of Michigan, and at various national synchrotron facilities. The experimental data area analyzed by comparison to theories which treat the interactions between the electrons in different ways, and which provide a link between the spectra and the electrical or magnetic properties. Thereby the various theories can be tested, with the possibility for discovering new phenomena. The program relies on strong collaborations with other groups for providing well characterized samples to measure, and for expert theore tical advice and advanced calculations. ***