Using Neutron as a Probe to Study Strongly Correlated Electron Materials

这个项目解决了我们这个时代占主导地位的新的科学主题，了解过渡金属氧化物(TMO)中表现出的复杂的自组织行为的基本和实际重要性。该研究计划的目的是以中子散射为主要工具，探索和了解TMOS中各相的微观起源。特别是，该项目将专注于高转变温度(高T_c)超导体和巨磁阻(CMR)锰氧化物。对于高温超导体，该项目将研究磁性和超导电性之间相互作用的性质。对于CMR锰氧化物，该项目将侧重于了解微观自旋/晶格动力学如何决定这些材料的体磁和输运性质。作为这项研究计划的核心部分，中子散射实验将主要在橡树岭国家实验室(ORNL)新升级的高通量同位素反应堆(HFIR)进行。然而，当HFIR没有类似的能力时，该项目也将利用美国和欧洲的其他世界级设施。这项研究计划的影响将包括培训下一代中子散射者，并阐明TMO奇异特性的性质。新千年的物理学将把我们从简单而基本的定律带入一个新出现的复杂世界。这个项目探讨了产生新的集体现象的基本物理过程。已知的呈现这些集体现象的材料是强关联电子过渡金属氧化物(TMOS)。对这些现象的理解不仅将提高我们的基础科学知识，还将使我们有能力设计出具有新颖和可预测性能的材料。这个项目将使用中子散射来研究两类TMO，高温铜氧化物超导体和巨磁电阻锰氧化物。该计划的目标是利用中子作为探测器来探索和了解TMOS中各种相的微观起源。中子散射实验将主要在橡树岭国家实验室(ORNL)新升级的高通量同位素反应堆(HFIR)进行。然而，当HFIR没有类似的能力时，该项目也将利用美国和欧洲的其他世界级设施。这项研究计划的影响将包括培训下一代中子散射者，并阐明TMO奇异特性的性质。

This project addresses the dominant new scientific theme of our time, the fundamental and practical importance of understanding complex, self-organizing behavior exhibited in transition metal oxides (TMOs). The objective of this research program is to explore and understand the microscopic origins of various phases in the TMOs using neutron scattering as a primary tool. Specially, the project will focus on high-transition temperature (high-Tc) superconductors and colossal magneto-resistance (CMR) manganese-oxides. For high-Tc superconductors, the project will investigate the nature of the interplay between magnetism and superconductivity. For CMR manganese-oxides, the project will focus on understanding how the microscopic spin/lattice dynamics determine the bulk magnetic and transport properties of these materials. Neutron scattering experiments, the core part of this research program, will be performed mostly at the newly upgraded high-flux isotope reactor (HFIR) at the Oak Ridge National Laboratory (ORNL). However, the project will also utilize other world-class facilities in the U.S. and Europe when similar capabilities are unavailable at HFIR. The impact of this research program will include the training of the next generation of neutron scatters and elucidating the nature of the exotic properties of the TMOs. Physics in the new millennium will take us into the world of emergent complexity from simple and basic laws. This project addresses the fundamental physical processes that give rise to novel collective phenomena. The materials known to exhibit these collective phenomena are the strongly correlated electron transition metal oxides (TMOs). The understanding of these phenomena will not only enhance our knowledge of basic science, but also gives us the ability to design materials with novel and predictable properties. This project will use neutron scattering to investigate two families of the TMOs, the high-transition-temperature copper-oxide superconductors and colossal magneto-resistance manganese-oxides. The objective of the program is to explore and understand the microscopic origins of various phases in the TMOs using neutron as a probe. Neutron scattering experiments will be performed mostly at the newly upgraded high-flux isotope reactor (HFIR) at the Oak Ridge National Laboratory (ORNL). However, the project will also utilize other world-class facilities in the U.S. and Europe when similar capabilities are unavailable at HFIR. The impact of this research program will include the training of the next generation of neutron scatters and elucidating the nature of the exotic properties of the TMOs.