Novel Correlation Effects in Condensed Matter Physics

凝聚态物理中的新颖相关效应

• 批准号: 9220416
• 负责人: Sudip Chakravarty
• 金额: $ 18万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-02-01 至 1996-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9220416&HistoricalAwards=false
• 关键词: Novel; Correlation; Effects; Condensed; Matter

In condensed matter systems there are a large number of degrees of freedom which interact strongly with each other. Many phemonena, however, can be understood on the basis of a small number of degrees of freedom interacting on a single scale not significantly larger than the atomic length scale. A self-consistent one- particle theory can adequately describe these phenomena. In contrast, there are many instances in which it is impossible to guess the qualitative behavior of the system from a theory based on a few degrees of freedom. The aim of the present proposal is to examine correlation effects in these strongly interacting systems. In particular, theoretical research will be conducted on novel correlations in quantum antiferromagnets, on magnetic correlations in high temperature cuprate superconductors, and on electronic correlation effects in newly discovered superconductors made by doping fullerine molecular solids with alkali atoms. %%% The theoretical research will focus on the physics of various materials which cannot be understood using conventional models and techniques. These materials include the copper-based high temperature superconductors, magnetic materials and the newly discovered superconducting materials based on the new form of carbon, Buckminsterfullerine. New theoretical techniques will be developed to understand these complex systems.

在凝聚态系统中， 自由是相互作用的。 很多费莫纳， 然而，可以理解的基础上，少数 在单一尺度上相互作用的自由度并不显著 比原子长度尺度更大。 一个自洽的- 粒子理论可以充分描述这些现象。 在 相反，在许多情况下， 从基于以下的理论猜测系统的定性行为： 几个自由度。 本提案的目的是 检查这些强相互作用系统中的相关效应。 特别是对小说进行理论研究， 量子反铁磁体中的关联，磁关联 在高温铜氧化物超导体中， 新发现的超导体中的相关效应， 用碱原子掺杂富勒烯分子固体。 %%% 理论研究将集中在各种物理 使用传统模型无法理解的材料， 技术. 这些材料包括铜基高 高温超导体、磁性材料和新的 发现了基于新形式的超导材料 碳，巴克敏斯特富勒烯。 新的理论技术将 来理解这些复杂的系统。