Low Energy Electrodynamics in Solids with Strong Electron Correlations

非技术摘要：在许多新发现的材料中，电子电荷之间或磁矩之间存在特别强的相互作用，导致在相对较低的温度下出现新现象。例子包括超导性-没有任何损失的导电能力-或其他复杂的宏观有序的电荷和自旋分布相。理解这些材料的非常规性质是一个巨大的智力挑战，提高这种宏观有序状态的转变温度对开发新技术至关重要。本项目研究通过散射光（即，“光子”），同时通过它们的新相调整材料的性质。该项目的目标是更好地了解新兴特性的条件，并协助开发具有增强功能的新型材料。技术摘要：“强关联材料”中电子之间的相互作用与许多科学上重要和技术上有用的现象有关，包括超导性和奇异有序的电荷和自旋相。该项目应用低能光谱学的进展来表征这些非凡的自组织电子相，确定它们形成的条件，确定潜在的微观机制，并测试相关理论。该项目还为博士后和本科生提供低温高分辨率磁光光谱学方面的广泛培训。

Non-Technical Abstract:In many newly discovered materials, there is a particularly strong interaction between the electron charges or between the magnetic moments leading to new phenomena at relatively low temperatures. Examples include superconductivity - ability to conduct electricity without any loss - or other complex macroscopically ordered phases of charge and spin distributions. Understanding the unconventional properties of these materials presents a great intellectual challenge, and enhancement of transition temperatures of such macroscopically ordered states is critical to developing new technologies. This project investigates the basic mechanisms responsible for unconventional properties of strongly interacting materials by scattering light (i.e., "photons") from the materials while tuning the materials' properties through their novel phases. The goals of this project are to better understand the conditions responsible for the emerging properties, and to assist in development of novel materials with enhanced functionality. Technical Abstract:Interaction between electrons in "strongly correlated materials" is associated with many scientifically important and technologically useful phenomena, including superconductivity and exotically ordered charge and spin phases. This project applies the advances in low energy spectroscopy to characterize these extraordinary self-organized electronic phases, determine the condition under which they are formed, identify the underlying microscopic mechanisms, and test the relevant theories. This project also provides broad training to postdoc and undergraduate students in low-temperature high resolution magneto-optical spectroscopy.