Electron Spectroscopy Studies of Strongly Correlated Fermi Liquid and Non-Fermi Liquid Materials

DMR-9971611 Allen本研究涉及对强关联费米液体和非费米液体材料性质的研究。 有两大目标。 第一个是测量选定的相关电子材料的单粒子电子结构，而第二个试图构建新的基态性质和底层电子结构之间的关系。 这些总体目标将具体地在以下方面追求：（A）阐明1）新型低维材料和2）某些铀材料中的非费米液体（NFL）行为，以及（B）研究1）相同铀材料和2）表现出混合价态和近藤行为的4f电子六硼化物合金中的单离子和晶格相关性之间的相互作用。光电子能谱、逆光电子能谱以及角分辨光电子能谱和共振光电子能谱将是主要的实验技术。 这项研究将使研究生和博士后研究人员参与当代凝聚态物理学的前沿领域之一。这项研究涉及金属和金属化合物中电子行为的一些重要方面，需要对这些方面的理解才能在改进技术的方向上取得进展。 研究生和博士后研究助理将参与这项研究。 因此，他们将在凝聚态物理学的一个重要领域接受出色的训练，从而为进入将确定21世纪世纪未来几十年科学和技术方向的技术主流做好准备。 ***

DMR-9971611AllenThis research deals with investigations into the properties of strongly correlated Fermi-liquids and non-Fermi Liquid Materials. There are two broad objectives. The first is to measure the single-particle electronic structure of selected correlated electron materials while the second attempts to construct a relation between the novel ground state properties and the underlying electronic structure. These general goals will be pursued specifically on (A) the elucidation of non-Fermi-liquid (NFL) behavior in 1) novel low dimensional materials and 2) in certain uranium materials, as well as (B) the study of the interplay between single-ion and lattice correlations in 1) the same uranium materials and 2) in 4f electron hexaboride alloys which manifest mixed valence and Kondo behavior. Photoemission spectroscopy, inverse photoemission spectroscopy as well as angle resolved photoemission spectroscopy and resonant photoemission spectroscopy will be the primary experimental techniques used. This research will engage graduate students as well as post doctoral research associates in one of the forefront areas of contemporary condensed matter physics .%%%This research deals with some important aspects of the behavior of electrons in metals and metal compounds, the understanding of which is needed to make progress in the direction of improved technology. Graduate students and postdoctoral research associates will participate in this research. They will thereby receive excellent training in an important area of condensed matter physics and thus will be prepared to enter the technological mainstream which will define the scientific and technological directions during the next few decades of the 21st Century. ***