Strongly Correlated Fermi Systems

强相关费米系统

• 批准号: 1308141
• 负责人: Gabriel Kotliar
• 金额: $ 42万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1308141&HistoricalAwards=false
• 关键词: Strongly; Correlated; Fermi; Systems

TECHNICAL SUMMARY This award supports theoretical and computational research to improve the first-principles-based theoretical description of strongly correlated materials through the incorporation of quantum many-body theory methods like dynamical mean field theory and to investigate properties, ordered states, and associated phenomena of strongly correlated materials. The PI will develop many-body concepts analytical methods and computational techniques to investigate the properties of correlated metals insulators and superconductors. The PI will study the physical properties of Hunds metals such as the iron pnictides and chalcogenides. All these materials are "bad metals" at high temperatures. The PI will develop a theory of transport in a regime where materials are not well described by Fermi liquid theory. The PI will investigate the unusual thermoelectric properties of correlated insulators such as iron silicide and antimonide, in and out of equilibrium. In the long term, the PI envisions the construction of a framework for predicting and understanding the physical properties of correlated materials, building on the successes of the Dynamical Mean Field Theory. This framework would enable the computational design of materials with strongly correlated electron systems, starting from first principles. The PI plans to develop an interactive website which will serve as an archive of computationally intensive results for various materials. NONTECHNICAL SUMMARYThis award supports theoretical and computational research to improve materials-specific theoretical descriptions of materials in which electrons strongly interact with each other leading to strong correlations in electronic motion and unusual materials property and phenomena. Modern solid-state physics explains the physical properties of numerous materials, such as traditional metals, semiconductors, and insulators which provide the basis of our modern technological society. But materials with electrons derived from d- and f-electron shells tend to fall outside the scope of this theory and have remarkable properties. Examples include: iron pnictide materials which exhibit high temperature superconductivity where electrons flow in the absence of resistance, and iron silicide and iron antimonide which exhibit exceptionally large thermoelectricity where large temperature differences develop at different areas of the material when an electric field is applied. The PI will develop concepts, techniques, and computational tools to describe this class of materials and elucidate the origin of their remarkable properties The PI plans to develop an interactive website which will serve as an archive of computationally intensive results for various materials.

技术摘要该奖项支持理论和计算研究，以通过纳入量子多体理论方法（例如动态平均理论）和研究属性，有序状态以及相关材料的相关现象，从而改善基于第一原理的理论描述。 PI将开发多体概念分析方法和计算技术，以研究相关金属绝缘子和超导体的性质。 PI将研究hunds金属的物理特性，例如铁pnictides和辣椒剂。 所有这些材料在高温下都是“不良金属”。 PI将在Fermi液体理论无法很好地描述材料的制度中发展运输理论。 PI将研究相关绝缘剂（例如硅质和抗氧化物）的异常热电特性，进出平衡。从长远来看，PI设想了一个构建一个框架，以预测和理解相关材料的物理特性，这是基于动态平均场理论的成功的基础。 该框架将从第一原理开始，使具有强相关电子系统的材料的计算设计。 PI计划开发一个交互式网站，该网站将作为各种材料的计算密集型结果的档案。 非技术摘要这一奖项支持理论和计算研究，以改善对材料的特定材料特定理论描述，其中电子彼此之间强烈相互作用，从而导致电子运动和异常材料特性和现象的强烈相关性。 现代固态物理学解释了许多材料的物理特性，例如传统金属，半导体和绝缘子，这些材料为我们的现代技术社会提供了基础。但是，具有源自D-和F-电子壳的电子的材料往往落在该理论范围之内，并且具有显着的特性。示例包括：具有高温超导性的pnictide材料，其中电子在没有抗性的情况下流动，以及在应用电场时在电场时在材料的不同区域发展出极大温度差异的硅质和铁抗氨基酯。 PI将开发概念，技术和计算工具来描述这类材料并阐明其非凡属性的起源PI计划开发一个交互式网站，该网站将作为各种材料的计算密集型结果的档案。