CAREER: Effects of Pressure and Magnetic Field in Strongly-Correlated-Electron Systems with Non-Collinear Magnetism

新墨西哥州立大学的这项教师早期职业发展(CALEAR)项目将专注于强关联的电子系统，这些系统展示了磁矩的非共线排列。施加足够高的压力或强磁场可以扰乱非共线有序，不同的依赖关系将允许分离直接和间接交换相互作用以及由于相干、塞曼和晶场项而产生的贡献。更好地理解强关联电子系统中的磁性，将为了解磁矩之间相互作用的复杂层次、标准模型的有效性限制以及长程磁序的前提条件提供不可或缺的信息。该项目将使用洛斯阿拉莫斯国家实验室的中子散射和高磁场用户设施，大部分研究将在世界其他地方无法实现的多种极端样品环境条件(低温、高压、强磁场)下进行。研究生将获得磁学领域的深入专业知识，他们将获得尖端中子散射和强磁场技术的技能，这些技术目前对前沿研究的需求很大。此外，该项目在新墨西哥州南部和得克萨斯州西部以西班牙裔为主的社区推动了强大的材料科学计划(一个快速增长的领域，拥有许多有益的职业机会)。磁性材料对许多技术应用具有非同寻常的重要性。开发和设计新的磁性设备需要对所研究材料的磁性有详细的了解。具有强相互作用电子的材料表现出各种令人着迷的性质，其中许多还没有完全被理解。在这些所谓的强关联电子系统中，各种相互作用可以导致磁矩以一种不寻常的非共线方式排列。新墨西哥州立大学的这项教师早期职业发展(CALEAR)项目将重点研究这种非共线磁体在世界纪录的外部条件(高压和强磁场)下的特性。这一结果可望为强关联电子系统的磁性建模提供必要的输入。研究生将接受进行世界级研究的培训，这将有助于为学术界、国家实验室和工业领域的下一代领先科学家做准备。此外，该项目在新墨西哥州南部和得克萨斯州西部以西班牙裔为主的社区促进了强大的材料科学计划(一个快速增长的领域，有许多有益的职业机会)的努力。

This Faculty Early Career Development (CAREER) project at New Mexico State University will focus on strongly-correlated-electron systems that exhibit non-collinear arrangements of the magnetic moments. Non-collinear order can be perturbed by the application of sufficiently high pressures or high magnetic fields, where different dependencies would allow separating direct and indirect exchange interactions as well as contributions due to coherence, Zeeman and crystal-field terms. A better understanding of the magnetism in strongly-correlated-electron systems will provide indispensable information on the complicated hierarchy of interactions between magnetic moments, the limits of validity of standard models, and the pre-conditions for long-range magnetic order. The project will use the neutron-scattering and high-magnetic-field user facilities at Los Alamos National Laboratory, and a substantial portion of the studies will be performed under multi-extreme sample-environment conditions (low temperatures, high pressures, high magnetic fields) that cannot be achieved elsewhere in the world. Graduate students will gain in-depth expertise in the field of magnetism and they will acquire skills in cutting-edge neutron-scattering and high-magnetic-field techniques, which are currently in great demand for forefront research. In addition, this project fosters efforts toward a strong Materials Science Program (a fast-growing field with many rewarding career opportunities) in the predominantly Hispanic communities in Southern New Mexico and Western Texas.%%%Magnetic materials are of extraordinary importance for many technological applications. The development and design of new magnetic devices requires a detailed understanding of the magnetic properties of the material under investigation. Materials with strongly interacting electrons exhibit a variety of fascinating properties, many of which are not completely understood. In these so-called strongly-correlated-electron systems, various interactions can cause the magnetic moments to arrange in an unusual non-collinear fashion. This Faculty Early Career Development (CAREER) project at New Mexico State University will focus on the properties of such non-collinear magnets at world-record external conditions (high pressures and high magnetic fields). The results are expected to provide indispensable input for modeling the magnetism in strongly-correlated-electron systems. Graduate students will be trained in performing world-class research, and this will help to prepare the next generation of leading scientists in Academia, National Laboratories and Industry. In addition, this project fosters efforts toward a strong Materials Science Program (a fast-growing field with many rewarding career opportunities) in the predominantly Hispanic communities in Southern New Mexico and Western Texas.***