Development of an Integrated Facility for Surface Phase Investigation of Complex Materials and Education

复杂材料表面相研究和教育综合设施的开发

• 批准号: 9975731
• 负责人: E. Ward Plummer
• 金额: $ 27.45万
• 依托单位: University of Tennessee Knoxville
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-09-01 至 2001-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9975731&HistoricalAwards=false
• 关键词: Development; Integrated; Facility; Surface; Phase

9975731PlummerThis award will provide partial support for the development of a facility for the study of surfaces of complex materials, specifically layered transition metal oxides. The challenges and opportunities for discoveries associated with the effects of brokensymmetry in layered transition-metal oxides (TMOs), specifically at surfaces and interfaces, are immense. Interest in this general class of materials stems from the richness of their physical properties, the complexity of the underlying physics, and the promise of technological applications. TMOs are complex because the structural, electronic, and magnetic properties are strongly coupled, but not always linearly. A small change in one property (e.g., structure) can produce a large change in another property (e.g., the magnetic state). Many of these materials are layered or quasi two-dimensional (2D), and many of the most interesting physical phenomena such as phase transitions are associated with and controlled by symmetry-breaking perturbations. A surface (or an interface) breaks the inherent symmetry in a solid and can thus change the order parameters associated with various types of transitions. Our objective is to construct a facility capable of characterizing the electronic, magnetic, and structural properties at the surface. The goal is to study surface phase transitions in these complex TMOs and to understand how these transitions can be tuned to produce a desired response.This facility will be used to train a "new breed" of surface materials scientists. The experimental students will be introduced to a variety of state-of-the-art characterization techniques and will be involved in both the synthesis and characterization efforts. They will develop the ability to think chemically as well as physically. In this age of complex materials, such ability is absolutely essential.%%%This award enables a unique partnership between scientists and engineers at Oak Ridge National Laboratory and the University of Tennessee for research and training of students.***

9975731 Plummer该奖项将为研究复杂材料表面，特别是层状过渡金属氧化物的设施的开发提供部分支持。与层状过渡金属氧化物(TMO)断裂对称性的影响相关的发现的挑战和机会是巨大的，特别是在表面和界面。对这类材料的兴趣源于它们丰富的物理性质，基本物理的复杂性，以及技术应用的前景。TMO是复杂的，因为其结构、电子和磁性是强耦合的，但并不总是线性的。一种性质(例如，结构)的小变化可能导致另一种性质(例如，磁状态)的大变化。其中许多材料是层状的或准二维的，许多最有趣的物理现象，如相变，都与对称破缺微扰有关，并受其控制。表面(或界面)打破了实体中固有的对称性，因此可以改变与各种类型的转变相关联的序参数。我们的目标是建造一种能够表征表面的电子、磁性和结构属性的设备。我们的目标是研究这些复杂的TMO中的表面相变，并了解如何调整这些相变以产生所需的响应。该设备将被用来培训“新一代”表面材料科学家。实验学生将被介绍到各种最先进的表征技术，并将参与合成和表征工作。他们将发展化学思维和物理思维的能力。在这个复杂材料的时代，这种能力是绝对必要的。%该奖项使橡树岭国家实验室和田纳西大学的科学家和工程师在研究和培训学生方面建立了独特的合作伙伴关系。*