Unravelling nanoscale ordering by investigating the emerging pathways between electronic structure and magnetism

我的研究计划集中在负责科学迷人的机制的研究，往往是有用的独特的纳米系统的磁性。 总体目标是在纳米磁性起源的量子水平上，特别是在界面上，开发新的方法和理解。 产生的新知识将解决与在电子水平上控制材料过程相关的重大挑战，并设计和完善具有原子级定制特性的新形式物质。 一个主要的计划目标是确定在氧化物界面之间的纳米级磁有序过程的物理。 将特别注意回答该领域当前重点提出的问题;通过在氧化铁多晶型物-Fe 2 O 3、-Fe 2 O 3和-Fe 2 O 3的纳米颗粒核上使用过渡金属和金属氧化物壳的新原型系统，研究了表面和界面原子交换的自旋-轨道耦合效应，以及界面处的Dzyaloshinski-Moriya相互作用。及其理论和实验研究。 作为在纳米颗粒系统中制造精确控制界面及其表征的先驱（例如，我在Springer的纳米材料磁性表征技术中的章节），我的HQP能够使用揭示技术相关现象的体积控制和开/关开关的物理学的技术来研究高质量的界面。 HQP制造的材料是我教授的广泛技能的门户，从传统的实验室技术到加速器/束线物理。 除了传统的工具，我们使用最新的X射线同步加速器技术和配位场多重态计算与原子探针，如穆斯堡尔光谱。 这项工作需要对数据分析、理论和计算机建模有深刻的理解。 HQP学习解开电子结构和磁性之间的联系，从而获得磁性的新见解并阐明新的物理学。 我的计划将看到我们继续做高影响力的工作，如我们的先进材料，ACS应用材料和界面，物理评论B和应用物理快报的文章。 分拆包括与丰田的合作，涉及实习计划。 该计划将确保HQP继续获得顶级职位，如橡树岭国家实验室量子凝聚态部门的职位。该计划建立在我开发的工具，技术和新材料系统的基础上，并将继续增强，以实现我的长期愿景：探索凝聚态和材料物理学中的开放性问题，例如阐明磁界面处涌现行为的物理基础，并使纳米复合磁体等新技术成为可能。

My research program is concentrated on the study of the mechanisms responsible for the scientifically fascinating and often useful magnetism unique to nanoscale systems. The overarching goal is to develop new approaches and understanding at the quantum-level of nanomagnetism's origins, especially at interfaces. New knowledge generated will address grand challenges associated with controlling materials processes at the level of electrons, and designing and perfecting new forms of matter with atom-level tailored properties. A primary program objective is to identify the physics of magnetic ordering processes at the nanoscale between oxide interfaces. Special attention will be placed on answering questions directed by the field's current focus; spin-orbit coupling effects on surface and interface atomic exchange, and Dzyaloshinski-Moriya interactions at interfaces, by using novel prototype systems of transition metal and metal oxide shells on nanoparticle cores of the iron-oxide polymorphs -Fe2O3, -Fe2O3 and -Fe2O3.The proposed program involves the synthesis of nanomaterials, and their theoretical and experimental investigations. As a pioneer of fabricating precisely controlled interfaces in nanoparticle systems, and their characterization (e.g. my chapter in Magnetic Characterization Techniques for Nanomaterials by Springer), my HQP are able to investigate high quality interfaces using techniques that reveal the physics of the volume control and on/off switch of technologically relevant phenomena. Materials made by HQP are the gateway to the wide spectrum of skills I teach, ranging from conventional laboratory techniques to accelerator/beam line physics. In addition to the conventional tools, we use the newest x-ray synchrotron techniques and ligand field multiplet calculations with atomic probes like Mössbauer spectroscopy. The work requires a deep appreciation of data analysis, theory, and computer modelling. HQP learn to disentangle the connections between electronic structure and magnetism, thereby gaining novel insights of magnetism and elucidating new physics. My program will see us continue to do high impact work as exemplified in our Advanced Materials, ACS Applied Materials and Interfaces, Physical Review B, and Applied Physics Letters articles. Spin-offs include collaborations with Toyota that involve an internship program. The proposed program will ensure that HQP continue to secure top-tier positions like those in the Quantum Condensed Matter Division at Oak Ridge National Laboratory.This program builds on the tools, techniques and new materials systems I have developed and will continue to augment to enable my long term vision: Exploring open questions in condensed matter and materials physics such as elucidating the physics underlying emergent behaviour at magnetic interfaces, and enabling new technologies like nanocomposite magnets.