Strongly Correlated Electron Phenonema in Rare Earth and Actinide Intermetallics

稀土和锕系金属间化合物中强相关电子现象

• 批准号: 9408835
• 负责人: M. Brian Maple
• 金额: $ 52.5万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-09-01 至 1998-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9408835&HistoricalAwards=false
• 关键词: Strongly; Correlated; Electron; Phenonema; Rare

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. ***

小行星9408835 本计画研究f电子与d电子系统中的强关联电子现象。 这些现象包括非费米液体低温特性与非传统的近藤效应在掺杂的f-电子系统，超导性和磁性的重费米子化合物和形成小的能隙，由于杂交之间的本地f-和导电电子状态的杂交间隙半导体（也称为近藤绝缘体）。 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。 运输，热和磁性测量将在很宽的温度范围内进行。 该研究涉及与其他一些大学和国家实验室的合作，包括国家高磁场实验室。 %这个项目涉及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。 造成这些差异的原因还不清楚，因此对重费米子系统的研究可能会揭示高Tc材料的复杂问题。 新的重费米子材料将通过一系列技术制备和表征。 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。 该研究涉及与其他一些大学和国家实验室的合作，包括国家高磁场实验室。 这项研究将有助于培养博士后研究科学家和研究生在加州大学圣地亚哥分校和合作机构。 ***