Strongly Correlated Fermi Systems

强相关费米系统

基本信息

批准号：
1733071
负责人：
Gabriel Kotliar
金额：
$ 45万
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：
2018
资助国家：
美国
起止时间：
2018-06-01 至 2022-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1733071&HistoricalAwards=false
关键词：
Strongly Correlated Fermi Systems

项目摘要

NONTECHNICAL SUMMARY This award supports theoretical and computational research and education to advance understanding of strongly correlated materials which have unusual properties and to improve their theoretical description. Materials are ubiquitous in our daily life and improving them is key for future technological progress. This project advances the methods, concepts, techniques and computer codes needed to understand and predict the properties of strongly correlated electron materials. In these solids, the strong interactions among electrons lead to correlations in their motions that are challenging to describe in standard theoretical frameworks. Strongly correlated electron materials display a wealth of new and unusual physical properties, ranging from superconductivity at unusually high temperature to materials that transform from metals to insulators, a process that depends sensitively on external conditions. Superconductivity enables the flow of electric currents without resistance, while metal to insulator transitions are used in fast switches and new memory devices. A goal is to advance the predictive power of the theory to accelerate the process of material discovery and design.This project enables multiple educational activities, such as the training of undergraduate and graduate students, as well as postdoctoral associates, in the use of analytical and computational methods, and the use of computational facilities. Research will be disseminated through journal publications and the internet, as well as through seminars, conferences and schools. TECHNICAL SUMMARY This award supports theoretical and computational research and education to advance understanding of strongly correlated materials and to improve their theoretical description. This award supports developing methods, concepts, theory, algorithms and computer codes to understand the physical properties of strongly correlated materials in and out of equilibrium. A long-term goal is to enhance predictive power to accelerate the process of material discovery and design utilizing strongly correlated materials. Simplified many-body Hamiltonians will be constructed and used to understand qualitative aspects of strong correlation phenomena at low energies with computationally intensive calculations that model more accurately the microscopic complexity of real materials. Computational methods include combining electronic structure and dynamical mean-field theory. This project will continue the development and testing of this non-perturbative approach on materials of current experimental interest. In materials proximate to the Mott transition, the physics is governed by charge blocking. The PI will explore the implications of strong correlations near a Mott transition in nonequilibrium steady states in the presence of dissipation and electric fields. In Hund's metals, the physics is governed by spin blocking while the charge fluctuates strongly. The PI aims to develop the theory of Hund's metal and apply it to prototypical systems such as the iron pnictides and chalcogenide high-temperature superconductors and the ruthenium oxides. This project enables multiple educational activities, such as the training of undergraduate and graduate students, as well as postdoctoral associates, in the use of analytical and computational methods, and the use of computational facilities. Research will be disseminated through journal publications and the internet, as well as through seminars, conferences and schools.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

非技术性摘要该奖项支持理论和计算研究和教育，以促进对具有异常属性并改善其理论描述的强相关材料的理解。材料在我们的日常生活中无处不在，改善它们是未来技术进步的关键。该项目推进了理解和预测强相关电子材料的特性所需的方法，概念，技术和计算机代码。在这些固体中，电子之间的强烈相互作用导致其动作的相关性，这些动作具有挑战性地描述了标准理论框架。密切相关的电子材料显示出丰富的新型和异常的物理特性，从异常高温的超导性到从金属转变为绝缘体的材料，这一过程取决于外部条件。超导能力使电流流动不具有阻力，而金属到绝缘体的过渡则用于快速开关和新的存储器设备。一个目标是提高理论的预测能力，以加速物质发现和设计的过程。该项目可以使用分析和研究生的培训，例如对本科生和研究生的培训以及分析性和分析学的培训计算方法和计算设施的使用。研究将通过期刊出版物和互联网以及研讨会，会议和学校进行传播。技术摘要该奖项支持理论和计算研究和教育，以提高人们对牢固相关材料的理解并改善其理论描述。该奖项支持开发方法，概念，理论，算法和计算机代码，以了解强烈相关材料进出平衡的物理特性。一个长期的目标是增强预测能力，以加速使用密切相关的材料的材料发现和设计过程。简化的多体汉密尔顿人将被构造并用来了解低能在低能的强度相关现象的定性方面，并通过计算密集的计算更准确地模拟真实材料的显微镜复杂性。计算方法包括将电子结构和动态平均场理论组合。该项目将继续开发和测试这种非扰动方法有关当前实验感兴趣的材料。在接近Mott过渡的材料中，物理学受电荷阻塞的约束。在存在耗散和电场的情况下，PI将探索在非平衡稳态中莫特过渡附近的强相关的含义。在Hund的金属中，物理学受自旋阻塞的控制，而电荷强烈波动。 PI旨在开发Hund的金属理论，并将其应用于原型系统，例如pnictides和Chalcogenide高温超导体和氧化鱼。该项目使多种教育活动，例如对本科生和研究生的培训，以及博士后员工的使用，用于分析和计算方法以及计算设施的使用。研究将通过期刊出版物和互联网以及研讨会，会议和学校进行传播。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛的影响来通过评估来支持的。

项目成果

期刊论文数量（23）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Nonequilibrium mean-field theory of resistive phase transitions

DOI：
10.1103/physrevb.98.035145
发表时间：
2018-07-27
期刊：
PHYSICAL REVIEW B
影响因子：
3.7
作者：
Han, Jong E.;Li, Jiajun;Kotliar, Gabriel
通讯作者：
Kotliar, Gabriel

Steady-state superconductivity in electronic materials with repulsive interactions

具有排斥相互作用的电子材料的稳态超导性

DOI：
10.1103/physrevb.100.060508
发表时间：
2019
期刊：
Physical Review B
影响因子：
3.7
作者：
Hart O
通讯作者：
Hart O

Antiferromagnetic Order Breaks Inversion Symmetry in a Metallic Double Perovskite, Pb 2 NiOsO 6

反铁磁有序打破金属双钙钛矿 Pb 2 NiOsO 6 中的反演对称性

DOI：
10.1021/acs.chemmater.1c01032
发表时间：
2021
期刊：
Chemistry of Materials
影响因子：
8.6
作者：
Feng, Hai L.;Kang, Chang-Jong;Manuel, Pascal;Orlandi, Fabio;Su, Yu;Chen, Jie;Tsujimoto, Yoshihiro;Hadermann, Joke;Kotliar, Gabriel;Yamaura, Kazunari
通讯作者：
Yamaura, Kazunari

Signatures of Mottness and Hundness in archetypal correlated metals

DOI：
10.1038/s41467-019-10257-2
发表时间：
2019-06-20
期刊：
NATURE COMMUNICATIONS
影响因子：
16.6
作者：
Deng, Xiaoyu;Stadler, Katharina M.;Kotliar, Gabriel
通讯作者：
Kotliar, Gabriel

Optical investigation of the heavy-fermion normal state in superconducting UTe2

超导 UTe2 中重费米子正常态的光学研究

DOI：
10.1103/physrevb.106.085125
发表时间：
2022
期刊：
Physical Review B
影响因子：
3.7
作者：
Mekonen, Sirak M.;Kang, Chang-Jong;Chaudhuri, Dipanjan;Barbalas, David;Ran, Sheng;Kotliar, Gabriel;Butch, Nicholas P.;Armitage, N. P.
通讯作者：
Armitage, N. P.