Strongly Correlated Electron Phenonema in Rare Earth and Actinide Intermetallics

9408835枫树这个项目研究f电子和d电子系统中的强关联电子现象。这些现象包括：与掺杂f电子系统中的非常规Kondo效应有关的非费米液体低温特性，重费米子化合物中的超导和磁性，以及由于杂化带隙半导体(也称为Kondo绝缘体)中局域f电子态和传导电子态之间的杂化而形成的小能隙。将制备和表征多晶和单晶形式的稀土和铀金属间化合物和合金。将在大范围的温度范围内进行运输、热和磁测量。这项研究涉及与其他一些大学和国家实验室的合作，包括国家强磁场实验室。这个项目涉及对一组被称为重费米子超导体的金属超导体的研究。这些材料在某些性质上不同于普通超导体和高温氧化铜超导体。这些差异的原因尚不清楚，因此对重费米子系统的研究可能会揭示高T_c材料的困惑问题。新的重费米子材料将被制备，并用一系列技术进行表征。虽然这些研究具有基本的科学意义，但它们在开发工业应用的有用材料方面也很重要。这项研究涉及与其他一些大学和国家实验室的合作，包括国家强磁场实验室。这项研究将有助于加州大学圣迭戈分校和合作机构的博士后研究科学家和研究生的培训。***

9408835 Maple This project investigates strongly correlated electron phenomena in f-electron and d-electron systems. These phenomena include non-Fermi-liquid low temperature characteristics associated with unconventional Kondo effects in doped f-electron systems, superconductivity and magnetism in heavy fermion compounds and the formation of small energy gaps due to hybridization between localized f- and conduction-electron states in hybridization gap semiconductors (also called Kondo insulators). Rare-earth and uranium intermetallic compounds and alloys, in both polycrystalline and single crystal form, will be prepared and characterized. Transport, thermal, and magnetic measurements will be made over a wide range of temperatures. The research involves collaboration with a number of other universitities and national laboratories, including the National High Magnetic Field Laboratory. %%% This project involves the study of a group of metallic superconductors called heavy Fermion superconductors. These materials differ in some of their properties from normal superconductors and the high-temperature copper oxide superconductors. The reasons for these differences are not understood, so investigations of the heavy Fermion systems may shed light on the perplexing problem of the high-Tc materials. New heavy Fermion materials will be prepared and characterized by a range of techniques. While these studies are of fundamental scientific interest, they are also of importance in the development of useful materials for industrial applications. The research involves collaboration with a number of other universities and national laboratories, including the National High Magnetic Field Laboratory. The research will contribute to the training of postdoctoral research scientists and graduate students at UCSD and at the collaborating institutions. ***