Electronic, Magnetic, and Structural Properties of Low Dimensional and Multifunctional Materials

低维多功能材料的电子、磁性和结构特性

• 批准号: 1309146
• 负责人: Eun Sang Choi
• 金额: $ 40万
• 依托单位: Florida State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-07-01 至 2017-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1309146&HistoricalAwards=false
• 关键词: Electronic; Magnetic; Structural; Properties; Low

****Technical Abstract****This proposal addresses fundamental problems where low dimensionality, anisotropy and size, combined with interacting electronic, magnetic, and lattice effects, lead to the physical properties of materials highly relevant to materials research. Materials of interests include quasi-one-dimensional organic segregated cation-anion charge transfer conductors, magnets, and superconductors on macro to nano-sized scales, and ferrimagnetic d- electron based compounds (such as AB2O4-type spinels) with strongly interacting charge, spin, orbital, and structural degrees of freedom. The thermodynamic variables used in this experimentally-based investigation include low temperatures, high magnetic fields, and high pressures, and the experimental tools include a broad range of methods in condensed matter physics. Scientifically, this project expands the understanding of how the order parameters in low dimensional and restricted geometry environments interact cooperatively, coexist, or exclude each other. In materials where magnetic and lattice effects strongly interact, low temperature and high magnetic field studies will give new insight into their complex interdependence. In terms of training, problem solving is emphasized. Young researchers in the group are exposed to a broad range of materials, methods, and to a large community of collaborators, both domestic and international. For education, the program's main approach is to bring the lab into the classroom and to the public through curricula, workshops and outreach programs.****Non-Technical Abstract****The scientific goals of the project will expand the understanding of how important properties of materials such as magnetism and superconductivity "talk to each other" and behave under extremes of temperature, magnetic field and pressure. In such cases, one kind of stimulus can make a material respond in a different way (for instance thermal to electrical, magnetic to electrical or electrical to mechanical) and such effects can lead to the development of multifunctional materials of potential technological importance. Low dimensionality and anisotropy, where the properties of materials such as the flow of energy or current may be very different in different directions, are key parameters in the realization and control of function, and both organic and inorganic materials will be the focus of the investigations. In terms of education, problem solving is a main goal in the training of young researchers in the group, who are exposed to a broad range of materials, methods, and to a large community of collaborators, both domestic and international. For education and outreach, the program's main approach is to bring the lab into the classroom and to the public. The PI and the research group have a culture of outreach as part of their responsibility, and have a sustained level of involvement in STEM and diversity related programs in the laboratory, the university, the state, and nationally.

****技术摘要****本提案解决了与材料研究高度相关的材料物理性质的低维度、各向异性和尺寸，以及相互作用的电子、磁性和晶格效应的基本问题。感兴趣的材料包括准一维有机分离的正负离子电荷转移导体、磁体和宏观到纳米尺度的超导体，以及具有强相互作用电荷、自旋、轨道和结构自由度的铁磁性d-电子基化合物（如ab2o4型尖晶石）。在这个基于实验的研究中使用的热力学变量包括低温、高磁场和高压，实验工具包括凝聚态物理中广泛的方法。在科学上，该项目扩展了对低维和受限几何环境中有序参数如何相互作用、共存或相互排斥的理解。在磁性和晶格效应强烈相互作用的材料中，低温和高磁场的研究将为它们复杂的相互依存关系提供新的见解。在培训方面，强调解决问题。该小组的年轻研究人员可以接触到广泛的材料、方法，并接触到大量的国内外合作者。在教育方面，该项目的主要方法是将实验室带入课堂，并通过课程、研讨会和外展项目向公众开放。****非技术摘要****该项目的科学目标将扩大对磁性和超导性等材料的重要性质的理解，以及在极端温度，磁场和压力下的行为。在这种情况下，一种刺激可以使材料以不同的方式作出反应（例如热对电，磁对电或电对机械），这种影响可以导致具有潜在技术重要性的多功能材料的发展。低维和各向异性是实现和控制功能的关键参数，其中材料的特性如能量或电流在不同方向上的流动可能非常不同，有机和无机材料都将是研究的重点。在教育方面，解决问题是培训小组中年轻研究人员的主要目标，他们可以接触到广泛的材料、方法，并接触到国内和国际的大量合作者。在教育和推广方面，该项目的主要方法是将实验室带入课堂和公众。PI和研究小组将外展文化作为其职责的一部分，并在实验室、大学、州和全国范围内持续参与STEM和多样性相关项目。