Strong Correlations in Chiral Electron Systems

手性电子系统中的强相关性

• 批准号: 1308972
• 负责人: Dmitrii Maslov
• 金额: $ 27万
• 依托单位: University of Florida
• 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: 2013-10-01 至 2016-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1308972&HistoricalAwards=false
• 关键词: Strong; Correlations; Chiral; Electron; Systems

TECHNICAL SUMMARYThis award supports combined theoretical research, education, and outreach to pursue the consequences of spin-orbit coupling in various materials through a chiral Fermi liquid theory. The research part of the proposal will explore possibilities of new phases of electronic matter in two-dimensional electron systems with strong spin-orbit coupling, focusing on electron and hole gases in gallium-aluminum-arsenide heterostructures, surface states of oxides, states at oxide interfaces, and three-dimensional topological insulators. The main thrusts of the project include+ developing the general theory of chiral Fermi liquids;+ applying this theory to three main archetypes of chiral Fermi liquids: systems with linear and cubic spin-orbit couplings, and Dirac fermions on the surface of topological insulators;+ identifying and classifying possible novel phases resulting from the interplay between the electron-electron and spin-orbit interactions in these systems;+ analyzing ferromagnetic order of nuclear spins coupled by an indirect interaction via heavy holes in p-gallium arsenide quantum wells; + developing a theory of novel collective modes in chiral Fermi liquids and proposing experiments for detecting these modes;+ understanding the interplay between superconductivity and spin-orbit coupling in a 2D superconductor at lanthanum aluminate/strontium titanate interfaces.This award also supports educational and outreach activities that will address diverse audiences of graduate and undergraduate students at the University of Florida, as well as a broader community of STEM teachers via the FloridaTeach program. Using the already existing framework of the advanced multi-faculty course at the UF Department of Physics, the PI will develop month-long courses of lectures on the topics relevant to this project for graduate students. Educational materials for these lectures will be available for a broader audience of graduate students and researchers via the UF Physics website. At the undergraduate level, the PI will involve participants of the existing REU program in some of the research projects related to this proposal. Finally, the PI will deliver popular lectures on advances in nanoscience to Florida STEM teachers. NONTECHNICAL SUMMARYThis award supports theoretical research that crosscuts two very active research areas in materials research. The first one is the field of strongly correlated electron systems and quantum phase transitions in itinerant electron systems. The main goal of this field is to understand the mechanisms by which the electrons in a many-electron system choose to organize themselves into an ordered state, such as magnetism over a liquid-like state. The second one is the field of semiconductor spintronics and quantum computation with spin qubits. The main physical ingredient of this field is correlated dynamics of just a few or many electrons along with their spins. There are interesting "overlap regions" between these two areas, and the PI aims to investigate them. The results will help to improve our understanding of fundamental physics in both areas, and thus will be of interest to a broader community. The universal language of symmetry-based phenomenology employed by the theory of Fermi liquids should be equally familiar to large communities of researchers working in strongly correlated electron systems and in spintronics/quantum computation. Training of graduate students will prepare them not only to life in academia but would also give them useful problem-solving skills that can be used outside of academia. The PI's group has a strong record for placement of PhD students some of whom made successful academic careers and some chose equally successful careers in industry.

该奖项支持理论研究，教育和推广相结合，通过手性费米液体理论追求各种材料中自旋轨道耦合的后果。 该提案的研究部分将探索具有强自旋轨道耦合的二维电子系统中电子物质新相的可能性，重点关注镓铝砷化物异质结构中的电子和空穴气体，氧化物的表面状态，氧化物界面的状态和三维拓扑绝缘体。该项目的主要工作包括：发展手征费米液体的一般理论;将这一理论应用于手征费米液体的三种主要原型：具有线性和立方自旋-轨道耦合的系统，以及拓扑绝缘体表面上的狄拉克费米子;识别和分类这些系统中电子-电子和自旋-轨道相互作用之间相互作用所产生的可能的新相;+分析p-砷化镓量子威尔斯中通过重空穴间接相互作用耦合的核自旋的铁磁序; +发展手征费米液体中新集体模式的理论并提出检测这些模式的实验;+理解铝酸镧中二维超导体中超导性和自旋轨道耦合之间的相互作用/该奖项还支持教育和推广活动，这些活动将针对佛罗里达大学的研究生和本科生的不同受众，以及通过FloridaTeach计划更广泛的STEM教师社区。使用先进的多教师课程在物理UF部门的现有框架，PI将开发为期一个月的讲座课程的主题相关的研究生这个项目。这些讲座的教育材料将通过UF物理网站提供给研究生和研究人员的更广泛的受众。在本科阶段，PI将让现有REU计划的参与者参与与本提案相关的一些研究项目。最后，PI将为佛罗里达STEM教师提供有关纳米科学进展的热门讲座。 非技术总结该奖项支持理论研究，横切材料研究中两个非常活跃的研究领域。第一个领域是强关联电子系统和巡游电子系统中的量子相变。该领域的主要目标是了解多电子系统中的电子选择将自己组织成有序状态的机制，例如磁性超过液体状态。第二个领域是半导体自旋电子学和自旋量子位的量子计算。这个领域的主要物理成分是几个或多个电子沿着自旋的相关动力学。在这两个领域之间有一些有趣的“重叠区域”，PI的目标是调查它们。结果将有助于提高我们对这两个领域基础物理学的理解，从而引起更广泛的社区的兴趣。费米液体理论所使用的基于量子力学的现象学的通用语言，对于从事强关联电子系统和自旋电子学/量子计算的大量研究人员来说，应该同样熟悉。对研究生的培训不仅会使他们为学术界的生活做好准备，而且还会使他们掌握可以在学术界之外使用的有用的解决问题的技能。PI的小组在博士生的安置方面有着良好的记录，其中一些人取得了成功的学术生涯，一些人选择了同样成功的工业生涯。