Local Moment and Heavy Fermion Physics

局域矩和重费米子物理

• 批准号: 9983156
• 负责人: Piers Coleman
• 金额: $ 24.6万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-12-01 至 2003-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9983156&HistoricalAwards=false
• 关键词: Local; Moment; Heavy; Fermion; Physics

9983156ColemanThis grant continues the support of the PI's theoretical work on a variety of problems in materials with strongly correlated electrons arising from strong local interelectron interactions. The research program consists of related topics in heavy fermion materials (i.e., compounds based on cerium and uranium with anomalously large specific heats). Part of the work is motivated by a new range of experiments that fine tune heavy fermion materials to a magnetic quantum critical point, with a goal of resolving whether local moments emerge at the quantum critical point or whether the transition is better described as a spin-density wave instability.%%%Many of the cerium and uranium based compounds have extraordinarily large specific heats, as if the electrons were a thousand times heavier. Ever since the discovery of these materials in mid-eighties, there has been a continuing interest in the properties of these materials. The PI has been active in theoretical work on these materials and related materials which have strongly correlated electronic effects arising from strong localized interactions between electrons. This work has potential impact on a range of phenomena from superconducting to magnetic properties of these materials.***

9983156Coleman 这项资助继续支持 PI 的理论工作，解决材料中由于强局域电子间相互作用而产生强相关电子的各种问题。 该研究计划包括重费米子材料（即具有异常大比热的基于铈和铀的化合物）的相关主题。 这项工作的一部分是由一系列新的实验推动的，这些实验将重费米子材料微调到磁量子临界点，目的是解决局部矩是否出现在量子临界点，或者过渡是否可以更好地描述为自旋-密度波不稳定性。%%%许多基于铈和铀的化合物具有非常大的比热，就好像电子重一千倍一样。 自从八十年代中期发现这些材料以来，人们对这些材料的特性一直感兴趣。 PI 一直积极参与这些材料和相关材料的理论工作，这些材料和相关材料具有由电子之间强烈的局域相互作用产生的强相关电子效应。 这项工作对这些材料从超导到磁性的一系列现象具有潜在影响。***