Expanding the Capabilities of Photoelectron Spectroscopy as to Reveal the Coupling of Different Degrees of Freedom in Complex Electron Systems

扩展光电子能谱的能力以揭示复杂电子系统中不同自由度的耦合

• 批准号: 0804902
• 负责人: Norman Mannella
• 金额: $ 30万
• 依托单位: University of Tennessee Knoxville
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-15 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0804902&HistoricalAwards=false
• 关键词: Expanding; Capabilities; Photoelectron; Spectroscopy; Reveal

Non-technical AbstractComplex electron systems with unusual properties, such as magnetism and superconductivity or large resistivity in a magnetic field, promise revolutionary technological applications. A unifying characteristic of these systems is the capability of exhibiting spectacular and unexpected phenomena arising from the interplay and competition of several intrinsic properties such as charge, crystal structure and magnetism. Unraveling the details of this interplay will help us understand the physics behind the functionality of complex materials. This project pursues the objectives of growing novel oxide materials and studying them in-situ with optical and x-ray techniques. Studies of previously characterized systems will also be made for comparison. The different tasks and project activities are designed with the goals to reach out to undergraduate and high school students, contribute to science infrastructure and integrate science and education. Educational/research programs will be available to allow the participation of students ranging from high school to graduate level. Intellectual infrastructure of this project is expected to aid in the development of new magnetic and superconducting devices.Technical AbstractTransition metal oxides such as cuprate high temperature superconductors and colossal magnetoresistive manganites are prototypical complex electron systems with unusual properties promising revolutionary technological applications. A unifying characteristic of these systems is the capability of exhibiting spectacular and unexpected phenomena arising from the interplay and competition of several intrinsic properties such as charge, lattice and spin. Unraveling the details of this interplay will consolidate our understanding of the physics at play behind the functionality of complex materials. This project pursues two main objectives, namely the carrying out of 1) the growth with Molecular Beam Epitaxy and in-situ Angle Resolved Photoemission studies of binary oxides, Fe3O4, VOx, EuO and V2O3, which will function as models systems for studying the many-body physics at play in more complex materials, and 2) time-resolved photoemission experiments on well-characterized systems, either with ultrafast optical techniques and/or x-rays, or whose nature of the interactions has already been extensively investigated with static measurements. The accomplishment of these goals on well-characterized systems will form a solid body of experience for extending the project to more complex materials. The different tasks and project activities are designed with the goals to reach out to undergraduate and high school students, contribute to science infrastructure and integrate science and education. Educational/research programs will be available to allow the participation of students ranging from high school to graduate level. Intellectual infrastructure of this project is expected to aid in the development of new magnetic and superconducting devices.

具有异常特性的非技术抽象复合电子系统，例如磁场和超导性或磁场中的大电阻率，承诺革命性的技术应用。这些系统的一个统一特征是表现出由几种内在特性（例如电荷，晶体结构和磁性）的相互作用和竞争引起的壮观和意外现象的能力。揭开此相互作用的细节将有助于我们了解复杂材料功能背后的物理学。该项目追求种植新型氧化物材料并使用光学和X射线技术对其进行研究的目标。还将对先前表征的系统进行研究。不同的任务和项目活动的设计具有与本科生和高中生联系的目标，为科学基础设施做出了贡献，并整合了科学和教育。教育/研究计划将可以允许从高中到研究生水平的学生参与。 预计该项目的智力基础架构有助于开发新的磁性和超导器件。技术抽象发射金属氧化物，例如铜酸盐高温超导体和巨大的磁磁铁锰矿是具有与众不同的革命技术的原型复杂电子系统。这些系统的一个统一特征是表现出由诸如电荷，晶格和自旋等几种内在特性的相互作用和竞争引起的壮观和意外现象的能力。揭开此相互作用的细节将巩固我们对复杂材料功能背后物理学的理解。该项目追求两个主要目标，即进行1）分子束外延和原位角度的增长解决了对二元氧化物，FE3O4，VOX，EUO和V2O3的光发射研究，该研究将起作用的模型，可在更复杂的材料中进行多种体现，以及2）在更复杂的材料中进行了多种体质，并将其运行。技术和/或X射线，或者已经通过静态测量对相互作用的性质进行了广泛的研究。这些目标在特定的系统上实现了这些目标，将形成稳固的经验，以将项目扩展到更复杂的材料。不同的任务和项目活动的设计具有与本科生和高中生联系的目标，为科学基础设施做出了贡献，并整合了科学和教育。教育/研究计划将可以允许从高中到研究生水平的学生参与。 该项目的智力基础设施有望有助于开发新的磁性和超导设备。