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

9975731普卢默该奖项将提供部分支持的复杂材料，特别是层状过渡金属氧化物表面的研究设施的发展。 与层状过渡金属氧化物（TMOs）中的对称性破缺效应相关的发现，特别是在表面和界面处，面临着巨大的挑战和机遇。 对这类材料的兴趣源于其丰富的物理性质，基础物理的复杂性以及技术应用的前景。 TMO是复杂的，因为结构，电子和磁性是强耦合的，但并不总是线性的。 一个属性的小变化（例如，结构）可以产生另一种性质的大的变化（例如，磁态）。 这些材料中的许多是层状或准二维（2D）的，并且许多最有趣的物理现象，如相变，都与破缺微扰有关并受其控制。 表面（或界面）打破了固体中固有的对称性，因此可以改变与各种类型的过渡相关的序参数。 我们的目标是建立一个能够表征表面的电子，磁性和结构特性的设施。 目标是研究这些复杂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。该设施将用于培训"新一代"表面材料科学家。 实验学生将被介绍给各种国家的最先进的表征技术，并将参与合成和表征工作。 他们将发展化学和物理思维的能力。 在这个材料复杂的时代，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学生培训方面建立了独特的伙伴关系。*

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.***