Self-Consistent Field Theory and Parquet Equations for Correlated Electron Systems

相关电子系统的自洽场论和 Parquet 方程

• 批准号: 9212971
• 负责人: Nelson Bickers
• 金额: $ 12万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-08-01 至 1995-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9212971&HistoricalAwards=false
• 关键词: Self; Consistent; Field; Theory; Parquet

This renewal grant is for an ongoing study of correlated lattice electron systems. The viewpoint is that of self-consistent-field approximations and parquet theory. This allows the generalization of Hartree-Fock theory to systems having strong correlation and large electronic fluctuations. This provides a semi-analytical alternative (and test) for numerical techniques like exact diagonalization or simulation. In addition to development of renormalization group techniques for this class of theory, various issues concerned with superconductivity and charge-density ordering in strongly correlated materials (such as high-Tc superconductors) will be studied. %%% The electronic structure of solids determines most, if not all, of the common properties of materials on which present and future technology is based. However, there are large classes of materials for which our present understanding is quite limited. One such class is strongly correlated materials (including high-Tc superconductors), in which the forces between electrons are very stong. This grant funds a project intended to extend to this new class of materials a group of theoretical techniques which allow the properties of normal systems to be understood.

这项更新补助金是用于正在进行的相关晶格研究 电子系统 本文采用自洽场的观点 近似和拼花理论。 这就允许了 Hartree-Fock理论应用于强相关系统， 巨大的电子波动。 这提供了一个半分析 替代（和测试）的数值技术，如精确 对角化或模拟。 除了发展 这类理论的重正化群技术，各种 与超导性和电荷密度有序有关的问题 在强相关材料中（如高温超导体） 将被研究。 %%% 固体的电子结构决定了大多数，如果不是全部， 材料的共同特性， 技术是基础。 然而，有很多种类的材料 我们目前对它的了解还很有限。 一个这样 类是强相关材料（包括高Tc 超导体），其中电子之间的力非常 强。 这笔赠款资助一个项目，旨在扩大到这个新的 一类材料，一组理论技术，允许 正常系统的特性。