Correlated Electron Systems with Strong Spin-orbit Coupling

具有强自旋轨道耦合的相关电子系统

• 批准号: 1507621
• 负责人: Gregory Fiete
• 金额: $ 30万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-09-15 至 2018-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1507621&HistoricalAwards=false
• 关键词: Correlated; Electron; Systems; Strong; Spin

NONTECHNICAL SUMMARYThis award supports theoretical research and education to predict interesting new phases of electronic matter. The electronic and magnetic properties of materials underpin many modern technologies. Understanding materials that present unusual electronic states helps to lay the knowledge foundation for new technologies, in this case new electronic devices and possibly devices that can exploit not only the charge but also the spin of the electron for their operation. Spin is an intrinsic quantum mechanical property of an electron; the electron can be loosely thought of as spinning. The PI aims to explore materials in which the electron's spin interacts strongly with its motion while at the same time electrons interact strongly with each other giving rise to correlations in their motion. Materials that combine both strong electron correlations and strong spin-orbit coupling present opportunities for the discovery of new states of matter. The PI aims to study such materials with an eye towards predicting unusual properties and phases that may appear. A graduate student will receive training in theoretical condensed matter and materials physics through this project, and the PI will engage in outreach activities to the general public and high school students, including historically underrepresented groups in physics, notably women and Hispanics.TECHNICAL SUMMARYThis award supports theoretical research and education on materials with strong electronic correlations and strong spin-orbit coupling. The main goals of this project are to: (i) Make specific material predictions for topological phases with correlations, (ii) Study the two-dimensional to three-dimensional crossover in correlated thin-film systems with strong spin-orbit coupling, and (iii) Investigate the physics of light-matter interaction, such as when a correlated thin-film with strong spin-orbit coupling is placed in a photonic waveguide or microcavity. The PI will focus on transition metal oxides with heavy transition metal ions, such as those from the 4d and 5d series. Electronic correlations in some of these materials may be intermediate between highly correlated and weakly correlated. A variety of techniques will be used including: exact diagonalization, first principles methods, and density functional theory combined with dynamical mean field theory.A graduate student will receive training in theoretical condensed matter and materials physics through this project, and the PI will engage in outreach activities to the general public and high school students, including historically underrepresented groups in physics, notably women and Hispanics.

该奖项支持理论研究和教育，以预测电子物质有趣的新阶段。材料的电子和磁性是许多现代技术的基础。 了解呈现不寻常电子状态的材料有助于为新技术奠定知识基础，在这种情况下，新的电子设备和可能的设备不仅可以利用电荷，而且还可以利用电子的自旋进行操作。自旋是电子固有的量子力学性质;电子可以被松散地认为是自旋的。PI旨在探索电子自旋与其运动强烈相互作用的材料，同时电子彼此强烈相互作用，从而产生运动相关性。联合收割机结合了强电子关联和强自旋轨道耦合的材料为发现新的物质状态提供了机会。 PI的目的是研究这些材料，着眼于预测可能出现的不寻常的性质和相。 一名研究生将通过该项目接受理论凝聚态和材料物理方面的培训，PI将参与面向公众和高中生的外联活动，包括历史上在物理学中代表性不足的群体，特别是女性和西班牙裔。技术总结该奖项支持具有强电子相关性和强自旋轨道耦合的材料的理论研究和教育。 该项目的主要目标是：（一）对具有相关性的拓扑相进行具体的材料预测，（二）研究具有强自旋轨道耦合的相关薄膜系统中的二维到三维交叉，以及（三）研究光物质相互作用的物理学，例如当具有强自旋轨道耦合的相关薄膜放置在光子波导或微腔中时。PI将专注于具有重过渡金属离子的过渡金属氧化物，例如4d和5d系列。 这些材料中的一些材料的电子相关性可能介于高相关性和弱相关性之间。 各种技术将被使用，包括：精确对角化，第一原理方法，密度泛函理论与动力学平均场理论相结合。一名研究生将通过该项目接受理论凝聚态和材料物理学的培训，PI将参与对公众和高中生的外联活动，包括历史上代表性不足的物理学群体，特别是妇女和西班牙裔。