Transport and Optical Phenomena in Correlated Electron Systems

相关电子系统中的传输和光学现象

基本信息

批准号：
2224000
负责人：
Dmitrii Maslov
金额：
$ 40万
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：
2022
资助国家：
美国
起止时间：
2022-12-01 至 2025-11-30
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2224000&HistoricalAwards=false
关键词：
Transport Optical Phenomena Correlated Electron

项目摘要

NONTECHNICAL SUMMARYThis award theoretical research on transport and optical properties of materials with unconventional electronic behavior. Investigations of transport and optical phenomena in condensed matter systems provides invaluable information about the dynamics of electrons and how they interact with each other and atomic vibrations. However, the analysis and interpretation of abundant experimental data is never straightforward and, quite often, challenging, due to a multitude of competing processes. One encounters such challenges even when describing electron transport in simple conventional metals, such as copper and aluminum, where electrons behave as almost free particles. Analysis becomes even more complicated in materials where strong electron-electron interaction erases any similarities with the free-electron picture. In this project, the PI and his team will investigate transport and optical properties of several unconventional systems, such as those where the strong interaction leads to a linear temperature dependence of the resistivity, systems where the electron's energy depends on its momentum in a linear fashion, and materials in which the spontaneous alignment of electric dipole moments is overcome by the quantum motion of the atoms. Studying these puzzling systems is not only important for advancing our scientific understanding of materials in general, but they could also potentially lead to technological innovations in the future, such as in lossless transmission of electricity and quantum information science.This award also supports educational and outreach activities. The PI will develop new moduli on subjects relevant to this award for a multi-faculty course on Advanced Topics in Condensed Matter Physics, adopt and revamp a joint History/Physics course that offers a dual exploration of physics discoveries from scientific and historical points of view, organize various workshops and conferences, and work on a new book on Quantitative Methods in Physics aimed at upper-undergraduate and graduate students. TECHNICAL SUMMARYThis project entails theoretical research on transport and optical properties of unconventional electronic systems. The research has three main objectives. In the first thrust, the PI and his team will focus on the theory of spin collective modes in bilayer graphene with proximity-induced Rashba and valley-Zeeman types of spin-orbit coupling, which will provide a new development in the Fermi-liquid theory with multiple electron valleys, spin-momentum locking, and non-Abelian Berry curvature. The second objective is to develop a detailed theory of intrinsic optical absorption in Dirac and Weyl semi-metals, induced by electron-electron and electron-hole interactions. At the first stage of this effort, the PI’s group will study optical absorption in model systems, at the level of low-energy single-particle Hamiltonians, accompanied by both Hubbard and Coulomb interaction. Subsequently, the group will turn to more realistic, material-dependent Hamiltonians and make specific predictions for optical absorption in real materials. The third objective is to describe theoretically several puzzling phenomena observed in doped quantum paraelectrics such as strontium titanate. The topics to be addressed within this objective include (i) the origin of the quadratic-in-temperature behavior of the resistivity; (ii) a proper description of charge and heat transport in a thermal metal without quasiparticles, and beyond the Planckian limit, (iii) the origin of a strong temperature dependence of the effective mass, as measured by optics and thermoelectric effect; and (iv) the origin of quasi-linear and quasi-isotropic magnetoresistance.This award also supports educational and outreach activities. The PI will develop new moduli on subjects relevant to this award for a multi-faculty course on Advanced Topics in Condensed Matter Physics, adopt and revamp a joint History/Physics course that offers a dual exploration of physics discoveries from scientific and historical points of view, organize various workshops and conferences, and work on a new book on Quantitative Methods in Physics aimed at upper-undergraduate and graduate students.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.

非技术摘要这一奖学理论研究，关于具有非常规电子行为的材料的运输和光学特性。凝结物质系统中传输和光学现象的研究提供了有关电子动力学以及它们如何相互作用和原子振动的宝贵信息。但是，由于多种竞争过程，对绝对实验数据的分析和解释永远不会直接，而且经常会挑战。即使在简单的常规金属（例如铜和铝）中描述电子传输时，也会遇到这种挑战，而电子的表现几乎是自由颗粒。在强烈的电子电子相互作用消除与自由电子图片的任何相似之处的材料中，分析变得更加复杂。在该项目中，PI和他的团队将研究几种非常规系统的运输和光学性能，例如强烈相互作用导致抗性的线性温度依赖性的系统，即电子能量以线性方式取决于其动量的系统，以及在其中材料的材料。电偶极矩的自发比对通过原子的量子运动来克服。研究这些拼图系统不仅对于我们对材料的科学理解不仅重要，而且还可能导致未来的技术创新，例如无损传播电力和量子信息科学。该奖项还支持教育和外展活动。 PI将开发与该奖项相关的主题的新模式，以介绍有关凝结物理学高级主题的多教科课程，采用和改进了联合历史/物理课程，从科学和历史观点中进行了双重探索，从科学和历史观点，组织各种研讨会和会议，并从事各种工作室和会议，并在物理学上进行了新的书籍，从而在物理学上进行了新的书籍范围内的新书。技术摘要项目需要关于非常规电子系统的运输和光学特性的理论研究。该研究具有三个主要目标。在第一个推力中，PI和他的团队将专注于双层石墨烯的自旋集体模式理论，并具有接近性诱导的Rashba和Valley-Zeman类型的自旋轨耦合，这将在费米 - 液体理论中提供新的发展，并提供多个电子山谷，旋转摩托车，旋转摩托车，以及非摩托车，以及非摩托车curverian curverian curverian curverian curvervation。第二个目标是发展详细的关于狄拉克和Weyl半金属中固有光学滥用的理论，该理论由电子电子和电子孔相互作用引起。在这项工作的第一阶段，PI的小组将在模型系统中研究光学滥用，在低能单粒子汉密尔顿人的水平上，并伴随着Hubbard和Coulomb的相互作用。随后，该小组将转向更现实，依赖物质的哈密顿人，并对真实材料中的光学滥用做出具体预测。第三个目标是描述理论上在掺杂的量子paraelectrics（例如钛酸锶）中观察到的几种困惑现象。该目标中要解决的主题包括（i）电阻率的二次温度行为的起源；（ii）适当描述没有准颗粒的热金属中的电荷和热传输，并超出普兰克极限，（iii）有效质量的强度依赖性的起源，如光学和热电效应所测量；（iv）准线性和准方向性磁性的起源。该奖项还支持教育和外展活动。 PI将开发有关与该奖项相关的主题的新模式，以介绍有关凝结物理学高级主题的多教科课程，采用和改进了联合历史/物理课程，从科学和历史观点中对物理发现进行了双重探索，从科学和历史角度组织，组织各种工作室和会议，并在物理学上的新书中进行了新的书籍，并在物理学上培训了良好的物理学范围，并在物理学范围内进行了启示。 NSF的法定使命，并使用基金会的知识分子优点和更广泛的影响审查标准来评估值得支持。