Photoemission Study of Strongly Interacting Electron Systems: Cuprates and Beyond

强相互作用电子系统的光电研究：铜酸盐及其他

• 批准号: 0304981
• 负责人: Zhi-Xun Shen
• 金额: $ 37.5万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-09-01 至 2006-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0304981&HistoricalAwards=false
• 关键词: Photoemission; Study; Strongly; Interacting; Electron

This project will study many-body effects in strongly interacting electron systems using high-resolution angle-resolved photoemission spectroscopy (ARPES). A major focus of the program will be the high-Tc superconductors. However, other novel materials such as MgB2 and the C60 family of compounds will also be investigated. Together, these materials represent a formidable challenge to develop new theoretical concepts, and thus an opportunity for spectroscopic experiments to play an important role in helping the development of theory. With much improved energy and momentum resolution, ARPES is ideally suited for this investigation due to its unique capability to measure key microscopic parameters that often reveal deep insights. The project will also have broader scientific and technological impact by training students and by developing high precision scientific tools.Materials in which the electrons interact strongly with each other exhibit a number of novel and interesting phenomena, including superconductivity at higher temperatures and a very large change in the electrical conductivity when exposed to a magnetic field. It is possible that some of these materials will prove to be of use to technology. This individual investigator project will explore the universality and the diversity of phenomena seen in materials with strongly interacting electrons. Understanding these materials, and the phenomena they exhibit, has been a formidable challenge. Using an advanced spectroscopic technique called angle resolved photoemission spectroscopy, this project seeks to increase our understanding of the materials. This tool makes it is possible to gain insight into microscopic processes occurring in these interesting materials. The technique has proven useful in increasing our understanding of high temperature superconductors. The project will also have broader impact by training students and by developing high precision scientific tools.

本计画将利用高解析度角分辨光电子能谱仪（ARPES）研究强交互作用电子系统中的多体效应。 该计划的一个主要重点将是高温超导体。 然而，其他新材料，如MgB2和C60族化合物也将被研究。 总之，这些材料代表了发展新理论概念的巨大挑战，因此光谱实验在帮助理论发展方面发挥重要作用的机会。 ARPES具有更高的能量和动量分辨率，非常适合这项研究，因为它具有测量关键微观参数的独特能力，这些参数往往能揭示深刻的见解。 该项目还将通过培训学生和开发高精度科学工具，产生更广泛的科学和技术影响。电子相互强烈作用的材料表现出许多新颖有趣的现象，包括在较高温度下的超导性和暴露于磁场时电导率的非常大的变化。这些材料中的一些可能会被证明对技术有用。 这个个人研究项目将探索具有强烈相互作用电子的材料中所见现象的普遍性和多样性。了解这些材料以及它们所表现出的现象是一个巨大的挑战。使用一种称为角分辨光电子能谱的先进光谱技术，该项目旨在增加我们对材料的理解。 该工具可以深入了解这些有趣材料中发生的微观过程。该技术已被证明有助于提高我们对高温超导体的理解。该项目还将通过培训学生和开发高精度科学工具产生更广泛的影响。