Neutron Scattering Studies of Spin and Lattice Dynamics in Electron-Doped Iron and Copper-Based High-Temperature Superconductors

电子掺杂铁基和铜基高温超导体中自旋和晶格动力学的中子散射研究

• 批准号: 1063866
• 负责人: Hanno Weitering
• 金额: $ 36万
• 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: 2011
• 资助国家: 美国
• 起止时间: 2011-06-15 至 2014-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1063866&HistoricalAwards=false
• 关键词: Neutron; Scattering; Studies; Spin; Lattice

Technical AbstractThe objective of this research program is to explore and understand the microscopic origin of high-transition-temperature (high-Tc) superconductivity in iron and copper based superconductors using neutron scattering as a primary tool. Specially, the project will focus on electron-doped iron and copper based high-Tc superconductors. We will investigate the nature of the interplay between magnetism and superconductivity. Neutron scattering experiments, the core part of this research program, will be performed mostly at the high-flux isotope reactor (HFIR) and Spallation Neutron Source (SNS) 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 and SNS. 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 these high-Tc superconductors.Non-Technical AbstractThis NSF project addresses the fundamental physical processes that give rise to novel collective phenomena such as high-transition temperature superconductivity. The materials known to exhibit these collective phenomena are the strongly correlated electron materials. 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. Specifically, the experimental program integrates neutron scattering experiments with lab based materials efforts, aimed at the fundamental understanding of the spin and lattice excitations in electron-doped high-transition-temperature (high-Tc) superconductors based on iron and copper. The objective of the program is to explore and understand the microscopic origins of various phases of iron and copper high-Tc superconductors using neutron as a probe. Neutron scattering experiments will be performed mostly at the high-flux isotope reactor (HFIR) and Spallation Neutron Source (SNS) at the Oak Ridge National Laboratory. However, the project will also utilize other world-class facilities in the U.S. and Europe when similar capabilities are unavailable at HFIR and SNS. 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 correlated electron materials.

本研究的目的是以中子散射为主要工具，探索和理解铁基和铜基超导体中高温超导电性的微观起源。特别是，该项目将专注于电子掺杂的铁和铜基高TC超导体。我们将研究磁性和超导电性之间相互作用的性质。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)的高通量同位素反应堆(HFIR)和散裂中子源(SNS)进行。然而，当HFIR和SNS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训练下一代中子散射者和阐明这些高温超导体奇异性质的性质。非技术摘要这项NSF项目致力于引起新的集体现象的基本物理过程，如高温超导。已知的呈现这些集体现象的材料是强关联电子材料。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。具体地说，该实验计划将中子散射实验与基于实验室的材料工作相结合，旨在从根本上了解铁和铜的电子掺杂高温转变温度(高温)超导体中的自旋和晶格激发。该计划的目标是利用中子作为探测器来探索和了解铁和铜高温超导体各相的微观起源。中子散射实验将主要在橡树岭国家实验室的高通量同位素反应堆(HFIR)和散裂中子源(SNS)进行。然而，当HFIR和SNS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，并阐明相关电子材料的奇异性质的性质。