Strong Coupling Physics in Mott and Related Systems

莫特及相关系统中的强耦合物理

• 批准号: 1104909
• 负责人: Philip Phillips
• 金额: $ 33万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-15 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1104909&HistoricalAwards=false
• 关键词: Strong; Coupling; Physics; Mott; Related

TECHNICAL SUMMARYThis award supports theoretical research and education that is aimed to advance understanding of strongly correlated electron materials. A recent advance from string theory, the gauge-gravity duality, has opened up a possible non-perturbative approach to the physics of quantum many-body systems. The PI will explore whether through this theory it may be possible to understand the physics of strongly correlated materials at low energies in a controlled way. The PI aims to tailor this technique for Mott insulators. A goal is to extend this technique so that basic problems of superconductivity in a non-fermi liquid system can be addressed. The PI will engage a new line of research to explore the possibility of superconductivity in the multi-orbital Mott systems, the oxychalcogenides. The PI also aims to disentangle how orbital ordering and magnetic order mediate transport anisotropies seen in recent experiments on the iron-based pnictide superconductors.This award also supports graduate student training at the frontiers of condensed matter theory. The PI will continue his work to increase the participation of minorities in science through recruiting and mentoring minority students and through outreach activities to public schools. The PI will also revise his recent textbook for the second edition. NON-TECHNICAL SUMMARYThis award supports theoretical research and education on materials which contain electrons that interact strongly with each other. Strong interaction between electrons leads to their correlated motion, rather like a complicated dance, and in the quantum world to new states of electronic matter. Of particular interest is the appearance of superconductivity in these strongly correlated materials. Superconductivity is one of the possible complicated dances of electrons with unusual properties, among them the ability to conduct electricity without losses. The problem of how to precisely describe these new states of matter in the language of theory is a challenging one. The PI will attempt to exploit advances in the theory of gravity to understand systems of many strongly interacting electrons and how they organize themselves into new states of matter. The PI will also use advanced but more conventional methods to study the emergence of unusual superconductivity in recently discovered materials. Through these studies, the PI aims to elucidate the nature of superconductivity in strongly correlated materials and the physical mechanism that leads electrons to organize into this state of matter. Understanding the latter could lead to the discovery of materials in which superconductivity appears at higher temperatures. So far superconductivity is relegated to the deep freeze where the atmospheric gas nitrogen is nearly a liquid or even colder still. The discovery of materials which exhibit superconductivity at temperatures higher than room temperature would lead to possible new electronic device technologies and methods for virtually lossless transmission of electric power.This award also supports graduate student training at the frontiers of condensed matter theory. The PI will continue his work to increase the participation of minorities in science through recruiting and mentoring minority students and through outreach activities to public schools. The PI will also revise his recent textbook for the second edition.

该奖项支持旨在促进对强相关电子材料的理解的理论研究和教育。 弦理论最近的一个进展，规范引力对偶性，为量子多体系统的物理学开辟了一条可能的非微扰途径。 PI将探索是否可以通过这个理论来理解低能量下强相关材料的物理学。 PI旨在为Mott绝缘子定制这种技术。 一个目标是扩展这项技术，使在非费米液体系统的超导性的基本问题可以解决。 PI将从事一项新的研究，以探索在多轨道莫特系统，氧硫属化物超导的可能性。PI还旨在解开轨道有序和磁序如何介导最近在铁基磷属元素化物超导体实验中观察到的输运各向异性。该奖项还支持凝聚态理论前沿的研究生培训。PI将继续努力，通过招募和指导少数民族学生，并通过对公立学校的宣传活动，增加少数民族对科学的参与。PI还将修改他最近的第二版教科书。非技术性总结该奖项支持对含有彼此强烈相互作用的电子的材料的理论研究和教育。电子之间的强相互作用导致它们的相关运动，就像一场复杂的舞蹈，并在量子世界中导致电子物质的新状态。特别令人感兴趣的是在这些强相关材料中出现超导性。超导性是具有不寻常性质的电子可能的复杂舞蹈之一，其中包括无损耗导电的能力。如何用理论的语言精确描述这些新的物质状态是一个具有挑战性的问题。PI将试图利用引力理论的进步来理解许多强相互作用电子的系统以及它们如何组织成新的物质状态。PI还将使用先进但更传统的方法来研究最近发现的材料中出现的不寻常的超导性。通过这些研究，PI旨在阐明强相关材料中超导性的本质以及导致电子组织成这种物质状态的物理机制。理解后者可能会导致发现在更高温度下出现超导性的材料。到目前为止，超导性被降级到深度冻结，其中大气中的气体氮几乎是液体，甚至更冷。在高于室温的温度下表现出超导性的材料的发现将导致可能的新的电子设备技术和方法，以实现几乎无损耗的电力传输。该奖项还支持凝聚态理论前沿的研究生培训。PI将继续努力，通过招募和指导少数民族学生，并通过对公立学校的宣传活动，增加少数民族对科学的参与。PI还将修改他最近的第二版教科书。