Quantum Theory of Strongly Interacting Electrons

强相互作用电子的量子理论

• 批准号: 9808685
• 负责人: Steven Kivelson
• 金额: $ 33万
• 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: 1998
• 资助国家: 美国
• 起止时间: 1998-07-01 至 2001-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9808685&HistoricalAwards=false
• 关键词: Quantum; Theory; Strongly; Interacting; Electrons

9808685KivelsonThis award supports research on new approaches to strongly interacting many-body quantum systems with the aim of elucidating the electronic properties of materials such as the high temperature superconductors, related perovskite ruthenates and nickelates, Bechgaard salts, and other organic superconductors. The PI intends to continue a coordinated study of the properties of doped Mott insulators. Specifically it is intended to investigate the properties of conducting stripe ordered, stripe liquid, and stripe liquid crystalline phases, the mechanism of high temperature superconductivity in these phases, an most ambitiously, to study the consequences of topological doping for the anomalous normal state of "bad metals." The PI plans an approach that includes controlled approximate solutions of microscopic models as well as developing more phenomenological theory with the aim of understanding the implications of experimental observations. Specific plans include: (1) studies of solvable electronic models which exhibit stripe phases, (2) an investigation of the consequences of fluctuations of the phase of the order parameter on the properties of superconductors with low superfluid densities, (3) studies to establish the conditions for the stability of possible liquid crystalline and isotropic liquid stripe phases, and to elucidate the electronic properties of these phases. %%% This proposal involves new approaches to the study of electronic properties of materials with strongly interacting electrons; a challenging problem at the forefront of condensed matter theory. The role of `striped phases' and superconducting fluctuations in high temperature superconductors are a focus of this work. ***

9808685 Kivelson该奖项支持研究强相互作用多体量子系统的新方法，目的是阐明高温超导体，相关钙钛矿双烯酸盐和镍酸盐，Bechgaard盐和其他有机超导体等材料的电子性质。 PI打算继续对掺杂莫特绝缘体的性质进行协调研究。具体而言，它的目的是研究导电条纹有序，条纹液体和条纹液晶相的性质，在这些阶段的高温超导性的机制，最雄心勃勃的是，研究拓扑掺杂的异常正常状态的“坏金属”的后果。“PI计划的方法包括微观模型的受控近似解，以及开发更多的唯象理论，目的是理解实验观察的含义。 具体计划包括：（1）研究具有条纹相的可解电子模型;（2）研究序参量的相位涨落对低超流密度超导体性质的影响;（3）研究建立可能的液晶和各向同性液体条纹相的稳定条件，并阐明这些相的电子性质。 这个提议涉及到研究具有强相互作用电子的材料的电子性质的新方法;凝聚态理论前沿的一个具有挑战性的问题。 高温超导体中的“条纹相”和超导波动的作用是这项工作的重点。 ***